New command -scsi_dev_family, new -as cdrecord option drive_scsi_dev_family=

libisoburn/libisoburn.ver

@@ -28,6 +28,7 @@ isoburn_get_mount_params;
 isoburn_igopt_attach_jte;
 isoburn_igopt_destroy;
 isoburn_igopt_detach_jte;
+isoburn_igopt_get_appended_as_apm;
 isoburn_igopt_get_appended_as_gpt;
 isoburn_igopt_get_data_start;
 isoburn_igopt_get_disc_label;
@@ -42,6 +43,7 @@ isoburn_igopt_get_out_charset;
 isoburn_igopt_get_over_mode;
 isoburn_igopt_get_over_ugid;
 isoburn_igopt_get_part_flags;
+isoburn_igopt_get_part_like_isohybrid;
 isoburn_igopt_get_partition_img;
 isoburn_igopt_get_prep_partition;
 isoburn_igopt_get_pvd_times;
@@ -55,6 +57,7 @@ isoburn_igopt_get_tail_blocks;
 isoburn_igopt_get_untranslated_name_len;
 isoburn_igopt_get_write_type;
 isoburn_igopt_new;
+isoburn_igopt_set_appended_as_apm;
 isoburn_igopt_set_appended_as_gpt;
 isoburn_igopt_set_disc_label;
 isoburn_igopt_set_efi_bootp;
@@ -67,6 +70,7 @@ isoburn_igopt_set_out_charset;
 isoburn_igopt_set_over_mode;
 isoburn_igopt_set_over_ugid;
 isoburn_igopt_set_part_flag;
+isoburn_igopt_set_part_like_isohybrid;
 isoburn_igopt_set_partition_img;
 isoburn_igopt_set_prep_partition;
 isoburn_igopt_set_pvd_times;
@@ -287,6 +291,7 @@ Xorriso_option_rollback;
 Xorriso_option_rom_toc_scan;
 Xorriso_option_rr_reloc_dir;
 Xorriso_option_scdbackup_tag;
+Xorriso_option_scsi_dev_family;
 Xorriso_option_scsi_log;
 Xorriso_option_session_log;
 Xorriso_option_setfacli;

xorriso/base_obj.c

@@ -207,6 +207,7 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->displacement_sign= 0;
  m->read_fs= 0;
  m->drives_exclusive= 1;
+ m->linux_scsi_dev_family= 0;
  m->early_stdio_test= 0;
  m->cache_num_tiles= 0;
  m->cache_tile_blocks= 0;

xorriso/drive_mgt.c

@@ -329,10 +329,11 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, char *show_adr,
      aquire_flag|= 64;
    if(flag & 128)
      aquire_flag|= 256;
-   burn_preset_device_open(xorriso->drives_exclusive, 0, 0);
+   burn_preset_device_open(xorriso->drives_exclusive |
+                           (xorriso->linux_scsi_dev_family << 2), 0, 0);
    burn_allow_drive_role_4(1 | (xorriso->early_stdio_test & 14));
    ret= isoburn_drive_aquire(&dinfo, libburn_adr, aquire_flag);
-   burn_preset_device_open(1, 0, 0);
+   burn_preset_device_open(1 | (xorriso->linux_scsi_dev_family << 2), 0, 0);
    Xorriso_process_msg_queues(xorriso,0);
    if(ret<=0) {
      if(flag & 128)
@@ -3404,3 +3405,10 @@ int Xorriso_pretend_full_disc(struct XorrisO *xorriso, int flag)
  return(1);
 }
 
+
+int Xorriso_scsi_dev_family(struct XorrisO *xorriso, int flag)
+{
+ burn_preset_device_open(xorriso->drives_exclusive | (xorriso->linux_scsi_dev_family << 2), 0, 0);
+ return(1);
+}
+

xorriso/emulators.c

@@ -54,6 +54,7 @@ int Xorriso_cdrskin_help(struct XorrisO *xorriso, int flag)
 "\t-version\tprint version information and exit emulation",
 "\t--devices\tprint list of available MMC drives and exit emulation",
 "\tdev=target\tpseudo-SCSI target to use as CD-Recorder",
+"\tdrive_scsi_dev_family=sr|scd|sg\t\tselect Linux device type",
 "\t-v\t\tincrement verbose level by one",
 "\t-V\t\tincrement SCSI command transport verbose level by one",
 "\t-checkdrive\tcheck if a driver for the drive is present",
@@ -126,7 +127,7 @@ int Xorriso_cdrskin(struct XorrisO *xorriso, char *whom, int argc, char **argv,
    "gracetime=",
 
    "assert_write_lba=", "fifo_start_at=", "dev_translation=",
-   "drive_scsi_dev_family=", "fallback_program=",
+   "fallback_program=",
    "tao_to_sao_tsize=", 
    
    "direct_write_amount=", "msifile=",
@@ -346,6 +347,11 @@ no_volunteer:;
      cpt= strchr(argpt, '=') + 1;
      Xorriso_option_modesty_on_drive(xorriso, cpt, 0);
 
+   } else if(strncmp(argpt, "-drive_scsi_dev_family=", 23) == 0 ||
+             strncmp(argpt, "drive_scsi_dev_family=", 22) == 0) {
+     cpt= strchr(argpt, '=') + 1;
+     Xorriso_option_scsi_dev_family(xorriso, cpt, 0);
+
    } else if(strncmp(argpt, "-stdio_sync=", 12)==0 ||
              strncmp(argpt, "stdio_sync=", 11)==0) {
      cpt= strchr(argpt, '=') + 1;

xorriso/iso_img.c

@@ -1090,7 +1090,8 @@ int Xorriso_mount(struct XorrisO *xorriso, char *dev, int adr_mode,
       strncmp(dev, "mmc:", 4) != 0)
      sprintf(libburn_adr, "stdio:%s", dev);
    burn_preset_device_open(
-           xorriso->drives_exclusive && !(xorriso->mount_opts_flag & 1), 0, 0);
+           (xorriso->drives_exclusive && !(xorriso->mount_opts_flag & 1)) |
+           (xorriso->linux_scsi_dev_family << 2), 0, 0);
    aquire_flag= 1;
    if((xorriso->toc_emulation_flag & 2) && adr_mode == 3)
      aquire_flag|= 16;
@@ -1099,7 +1100,7 @@ int Xorriso_mount(struct XorrisO *xorriso, char *dev, int adr_mode,
    if(xorriso->toc_emulation_flag & 8)
      aquire_flag|= 512;
    ret= isoburn_drive_aquire(&dinfo, libburn_adr, aquire_flag);
-   burn_preset_device_open(1, 0, 0);
+   burn_preset_device_open(1 | (xorriso->linux_scsi_dev_family << 2), 0, 0);
    Xorriso_process_msg_queues(xorriso,0);
    if(ret <= 0)
      {ret= 0; goto ex;}

xorriso/opts_d_h.c

@@ -1710,6 +1710,8 @@ int Xorriso_option_help(struct XorrisO *xorriso, int flag)
 "                 those lists empty. Defaulty entry in \"risky\" is \"/dev\".",
 "  -grow_blindly \"off\"|predicted_nwa",
 "                 Switch between modifying and blind growing.",
+"  -scsi_dev_family \"default\"|\"sr\"|\"scd\"|\"sg\"",
+"                 Linux specific: Choose device file type.",
 "  -read_speed number[\"k/s\"|\"m/s\"|\"[x]CD\"|\"[x]DVD\"|\"[x]BD\"]",
 "                 Set the read speed. Default is \"none\" = do not set speed",
 "                 before reading.",

xorriso/opts_p_z.c

@@ -1,7 +1,7 @@
 
 /* xorriso - creates, loads, manipulates and burns ISO 9660 filesystem images.
 
-   Copyright 2007-2015 Thomas Schmitt, <scdbackup@gmx.net>
+   Copyright 2007-2016 Thomas Schmitt, <scdbackup@gmx.net>
 
    Provided under GPL version 2 or later.
 
@@ -779,6 +779,28 @@ int Xorriso_option_scdbackup_tag(struct XorrisO *xorriso, char *listname,
 }
 
 
+/* Command -scsi_dev_family */
+int Xorriso_option_scsi_dev_family(struct XorrisO *xorriso, char *mode,
+                                   int flag)
+{
+ if(strcmp(mode, "default") == 0)
+   xorriso->linux_scsi_dev_family= 0;
+ else if(strcmp(mode, "sr") == 0)
+   xorriso->linux_scsi_dev_family= 1;
+ else if(strcmp(mode, "scd") == 0)
+   xorriso->linux_scsi_dev_family= 2;
+ else if(strcmp(mode, "sg") == 0)
+   xorriso->linux_scsi_dev_family= 4;
+ else {
+   sprintf(xorriso->info_text, "-scsi_dev_family: unknown family '%s'", mode);
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   return(0);
+ }
+ Xorriso_scsi_dev_family(xorriso, 0);
+ return(1);
+}
+
+
 /* Option -scsi_log */
 int Xorriso_option_scsi_log(struct XorrisO *xorriso, char *mode, int flag)
 {

xorriso/parse_exec.c

@@ -541,7 +541,7 @@ int Xorriso_count_args(struct XorrisO *xorriso, int argc, char **argv,
     "prog","prog_help","publisher","quoted_not_list","quoted_path_list",
     "read_fs","read_speed","reassure","report_about",
     "report_el_torito","report_system_area","rockridge",
-    "rom_toc_scan","rr_reloc_dir","scsi_log",
+    "rom_toc_scan","rr_reloc_dir","scsi_dev_family","scsi_log",
     "session_log","sh_style_result","signal_handling","sleep",
     "speed","split_size","status","status_history_max",
     "stdio_sync","stream_recording","system_id","temp_mem_limit","toc_of",
@@ -680,6 +680,7 @@ int Xorriso_cmd_sorting_rank(struct XorrisO *xorriso,
    "ecma119_map",
    "disk_dev_ino", "rom_toc_scan", "calm_drive", "ban_stdio_write",
    "early_stdio_test", "data_cache_size",
+   "scsi_dev_family",
 
    "* Character sets:",
    "charset", "local_charset",
@@ -1721,6 +1722,10 @@ next_command:;
    (*idx)+= 2;
    ret= Xorriso_option_scdbackup_tag(xorriso, arg1, arg2, 0);
  
+ } else if(strcmp(cmd, "scsi_dev_family") == 0) {
+   (*idx)++;
+   ret= Xorriso_option_scsi_dev_family(xorriso, arg1, 0);
+
  } else if(strcmp(cmd, "scsi_log") == 0) {
    (*idx)++;
    ret= Xorriso_option_scsi_log(xorriso, arg1, 0);

xorriso/text_io.c

@@ -2775,6 +2775,8 @@ int Xorriso_status(struct XorrisO *xorriso, char *filter, FILE *fp, int flag)
  static char channel_prefixes[4][4]= {".","R","I","M"};
  static char load_names[][20]= {"auto", "session", "track", "lba", "volid"};
  static int max_load_mode= 4;
+ static char scsi_family[8][8]=
+                              {"default", "sr", "scd", "st", "sg", "", "", ""};
  struct Xorriso_lsT *paths, *leafs, *s, *plst, *vlst;
 
  Xorriso_alloc_meM(sfe, char, 5 * SfileadrL + 80);
@@ -3750,6 +3752,12 @@ int Xorriso_status(struct XorrisO *xorriso, char *filter, FILE *fp, int flag)
    }
  }
 
+ is_default= (xorriso->linux_scsi_dev_family == 0);
+ sprintf(line, "-scsi_dev_family %s\n",
+               scsi_family[xorriso->linux_scsi_dev_family & 7]);
+ if(!(is_default && no_defaults))
+   Xorriso_status_result(xorriso,filter,fp,flag&2);
+
  do_single= 0;
  dev_filter= filter;
  if(dev_filter != NULL) {

xorriso/xorrecord.1

@@ -9,7 +9,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH XORRECORD 1 "Version 1.4.3, Feb 05, 2016"
+.TH XORRECORD 1 "Version 1.4.3, Mar 18, 2016"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -527,6 +527,25 @@ Afterwards end emulation without performing any drive operation.
 Only if used as first command line argument this option
 prevents reading and interpretation of startup files. See section FILES below.
 .TP
+\fBdrive_scsi_dev_family=sr|sdc|sg|default\fR
+GNU/Linux specific:
+.br
+By default, cdrskin tries to map Linux drive addresses to /dev/sr* before
+they get opened for operating the drive. This coordinates well with
+other use cases of optical drives, like mount(8). But since year 2010
+all /dev/sr* share a global lock which allows only one drive to process
+an SCSI command while all others have to wait for its completion.
+This yields awful throughput if more than one drive is writing or reading
+simultaneously.
+.br
+The global lock is not applied to device files /dev/sg* and also not with
+the system calls read(2), write(2). But ioctl(SG_IO) is affected, which is
+needed to perform the SCSI commands for optical burning.
+.br
+So for simultaneous burn runs on modern GNU/Linux it is advisable to use
+drive_scsi_dev_family="sg". The drive addresses may then well be given as
+/dev/sr* but will nevertheless get used as /dev/sg*.
+.TP
 \fB--grow_overwriteable_iso\fR
 Enable emulation of multi\-session writing on overwriteable media which
 contain an ISO 9660 filesystem. This emulation is learned from growisofs \-M
@@ -589,7 +608,8 @@ reaches a given low percentage value.
 This can ease the load on operating system and drive controller and thus help
 with achieving better input bandwidth if disk and burner are not on independent
 controllers (like hda and hdb). It may also help with simultaneous burns on
-different burners with Linux kernels like 3.16. On the other hand it increases
+different burners with Linux kernels like 3.16, if one has reason not to fix
+the problem by drive_scsi_dev_family="sg". On the other hand it increases
 the risk of buffer underflow and thus reduced write speed.
 .br
 Some burners are not suitable because they

xorriso/xorrecord.info

@@ -498,6 +498,23 @@ File: xorrecord.info,  Node: NonCdrecord,  Next: ExDevices,  Prev: Verbous,  Up:
      Only if used as first command line argument this option prevents
      reading and interpretation of startup files.  See section FILES
      below.
+drive_scsi_dev_family=sr|sdc|sg|default
+     GNU/Linux specific:
+     By default, cdrskin tries to map Linux drive addresses to /dev/sr*
+     before they get opened for operating the drive.  This coordinates
+     well with other use cases of optical drives, like mount(8).  But
+     since year 2010 all /dev/sr* share a global lock which allows only
+     one drive to process an SCSI command while all others have to wait
+     for its completion.  This yields awful throughput if more than one
+     drive is writing or reading simultaneously.
+     The global lock is not applied to device files /dev/sg* and also
+     not with the system calls read(2), write(2).  But ioctl(SG_IO) is
+     affected, which is needed to perform the SCSI commands for optical
+     burning.
+     So for simultaneous burn runs on modern GNU/Linux it is advisable
+     to use drive_scsi_dev_family="sg".  The drive addresses may then
+     well be given as /dev/sr* but will nevertheless get used as
+     /dev/sg*.
 --grow_overwriteable_iso
      Enable emulation of multi-session writing on overwriteable media
      which contain an ISO 9660 filesystem.  This emulation is learned
@@ -553,8 +570,9 @@ modesty_on_drive=parameter[:parameters]
      thus help with achieving better input bandwidth if disk and burner
      are not on independent controllers (like hda and hdb).  It may also
      help with simultaneous burns on different burners with Linux
-     kernels like 3.16.  On the other hand it increases the risk of
-     buffer underflow and thus reduced write speed.
+     kernels like 3.16, if one has reason not to fix the problem by
+     drive_scsi_dev_family="sg".  On the other hand it increases the
+     risk of buffer underflow and thus reduced write speed.
      Some burners are not suitable because they report buffer fill with
      granularity too coarse in size or time, or expect their buffer to
      be filled to the top before they go to full speed.
@@ -851,9 +869,9 @@ File: xorrecord.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: T
 
 * --devices get list of drives:          DriveAddr.           (line   8)
 * --grow_overwriteable_iso emulate ISO 9660 multi-session: NonCdrecord.
-                                                              (line  12)
+                                                              (line  29)
 * --multi_if_possible apply -multi if medium is suitable: NonCdrecord.
-                                                              (line  32)
+                                                              (line  49)
 * --no_rc do not execute xorriso startup files: NonCdrecord.  (line   8)
 * -atip inquire medium state:            Inquire.             (line  14)
 * -checkdrive inquire drive CD capabilities: Inquire.         (line  11)
@@ -866,7 +884,7 @@ File: xorrecord.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: T
 * -inq inquire drive identifiers:        Inquire.             (line   8)
 * -isosize obtain track size from ISO 9660 superblock: SetBurn.
                                                               (line 137)
-* -modesty_on_drive keep drive buffer hungry: NonCdrecord.    (line  56)
+* -modesty_on_drive keep drive buffer hungry: NonCdrecord.    (line  73)
 * -msinfo retrieve multi-session info:   Inquire.             (line  43)
 * -multi keep media appendable after burn run: SetBurn.       (line  89)
 * -nopad disable adding of bytes to end of track: SetBurn.    (line 151)
@@ -881,17 +899,19 @@ File: xorrecord.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: T
                                                               (line 113)
 * blank= make media re-usabable or format media: SetBurn.     (line  28)
 * dev= address the drive to be used:     DriveAddr.           (line  21)
-* dvd_obs= set write transaction payload size: NonCdrecord.   (line  49)
+* drive_scsi_dev_family= Linux device type to be used: NonCdrecord.
+                                                              (line  12)
+* dvd_obs= set write transaction payload size: NonCdrecord.   (line  66)
 * fs= set program fifo size:             SetBurn.             (line 174)
 * minbuf= keep drive buffer hungry:      SetBurn.             (line 205)
 * padsize= add bytes to end of track:    SetBurn.             (line 144)
 * speed= set write speed:                SetBurn.             (line 189)
-* stdio_sync= control stdio buffer:      NonCdrecord.         (line  98)
+* stdio_sync= control stdio buffer:      NonCdrecord.         (line 116)
 * stream_recording= try to get full speed on DVD-RAM, BD: NonCdrecord.
-                                                              (line  39)
+                                                              (line  56)
 * tsize= set a fixed track size:         SetBurn.             (line 126)
 * write_start_address= set block address for write start: NonCdrecord.
-                                                              (line  92)
+                                                              (line 110)
 
 
 File: xorrecord.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
@@ -905,20 +925,22 @@ File: xorrecord.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Accessing drive, wait for stdin, -waiti: SetBurn.           (line 113)
 * Bugs, reporting:                       Bugreport.           (line   6)
 * Data track, announce, -data:           SetBurn.             (line 157)
-* Defect management, control, stream_recording=: NonCdrecord. (line  39)
+* Defect management, control, stream_recording=: NonCdrecord. (line  56)
 * Drive, address, dev=:                  DriveAddr.           (line  21)
 * Drive, get list of, --devices:         DriveAddr.           (line   8)
 * Drive, inquire CD capabilities, -checkdrive: Inquire.       (line  11)
 * Drive, inquire identifiers, -inq:      Inquire.             (line   8)
+* Drive, Linux device type, drive_scsi_dev_family: NonCdrecord.
+                                                              (line  12)
 * Eject, the tray, -eject:               SetBurn.             (line 211)
 * Examples:                              Examples.            (line   6)
 * Fifo, set size, fs=:                   SetBurn.             (line 174)
 * Full speed, on DVD-RAM and BD, stream_recording=: NonCdrecord.
-                                                              (line  39)
+                                                              (line  56)
 * Media types, _definiton:               Standards.           (line  23)
 * Media, blank, blank=:                  SetBurn.             (line  28)
 * Media, format, blank=:                 SetBurn.             (line  28)
-* Media, keep appendable, --multi_if_possible: NonCdrecord.   (line  32)
+* Media, keep appendable, --multi_if_possible: NonCdrecord.   (line  49)
 * Media, keep appendable, -multi:        SetBurn.             (line  89)
 * Media, make re-usable, blank=:         SetBurn.             (line  28)
 * medium content, inquire, -toc:         Inquire.             (line  22)
@@ -926,7 +948,7 @@ File: xorrecord.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * MMC, _definiton:                       Standards.           (line   6)
 * multi-session info, retrieve, -msinfo: Inquire.             (line  43)
 * Multi-session, emulate ISO 9660, --grow_overwriteable_iso: NonCdrecord.
-                                                              (line  12)
+                                                              (line  29)
 * Options, overview, -help:              Verbous.             (line  30)
 * Overwritable media, _definiton:        Standards.           (line  30)
 * Padding, at end of track, padsize=:    SetBurn.             (line 144)
@@ -941,21 +963,21 @@ File: xorrecord.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Track size, obtain from ISO 9660, -isosize: SetBurn.        (line 137)
 * Track size, set fixed, tsize=:         SetBurn.             (line 126)
 * Track, _definiton:                     Standards.           (line  13)
-* Transaction size, set, dvd_obs=:       NonCdrecord.         (line  49)
+* Transaction size, set, dvd_obs=:       NonCdrecord.         (line  66)
 * Tray, eject, -eject:                   SetBurn.             (line 211)
 * Verbosity, increase, -v:               Verbous.             (line  16)
 * Verbosity, SCSI commands, -V:          Verbous.             (line  20)
 * Version, report, -version:             Verbous.             (line   8)
 * Write simulation , control, -dummy:    SetBurn.             (line 106)
 * Write start address, set, write_start_address=: NonCdrecord.
-                                                              (line  92)
+                                                              (line 110)
 * Write type, SAO/DAO, -dao:             SetBurn.             (line 172)
 * Write type, SAO/DAO, -sao:             SetBurn.             (line 168)
 * Write type, TAO, -tao:                 SetBurn.             (line 162)
-* Write, buffer syncing, stdio_sync=:    NonCdrecord.         (line  98)
+* Write, buffer syncing, stdio_sync=:    NonCdrecord.         (line 116)
 * Write, drive buffer, -immed:           SetBurn.             (line 208)
 * Write, drive buffer, minbuf=:          SetBurn.             (line 205)
-* Write, drive buffer, modesty_on_drive=: NonCdrecord.        (line  56)
+* Write, drive buffer, modesty_on_drive=: NonCdrecord.        (line  73)
 * xorriso, mkisofs emulation:            Xorriso.             (line   6)
 * xorriso, options:                      Options.             (line   6)
 
@@ -973,21 +995,21 @@ Node: Inquire7618
 Node: SetBurn10487
 Node: Verbous20938
 Node: NonCdrecord22488
-Node: Examples28246
-Node: ExDevices28907
-Node: ExMedium29125
-Node: ExBlank29388
-Node: ExFormat29609
-Node: ExDeformat30127
-Node: ExIsoSingle30394
-Node: ExIsoMulti30678
-Node: ExIsoFly32312
-Node: ExAfio32983
-Node: Files33981
-Node: Seealso34537
-Node: Bugreport34900
-Node: Legal35491
-Node: CommandIdx36420
-Node: ConceptIdx39696
+Node: Examples29314
+Node: ExDevices29975
+Node: ExMedium30193
+Node: ExBlank30456
+Node: ExFormat30677
+Node: ExDeformat31195
+Node: ExIsoSingle31462
+Node: ExIsoMulti31746
+Node: ExIsoFly33380
+Node: ExAfio34051
+Node: Files35049
+Node: Seealso35605
+Node: Bugreport35968
+Node: Legal36559
+Node: CommandIdx37488
+Node: ConceptIdx40905
 
 End Tag Table

xorriso/xorrecord.texi

@@ -50,7 +50,7 @@
 @c man .\" First parameter, NAME, should be all caps
 @c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 @c man .\" other parameters are allowed: see man(7), man(1)
-@c man .TH XORRECORD 1 "Version 1.4.3, Feb 05, 2016"
+@c man .TH XORRECORD 1 "Version 1.4.3, Mar 18, 2016"
 @c man .\" Please adjust this date whenever revising the manpage.
 @c man .\"
 @c man .\" Some roff macros, for reference:
@@ -732,6 +732,27 @@ Afterwards end emulation without performing any drive operation.
 Only if used as first command line argument this option
 prevents reading and interpretation of startup files. See section FILES below.
 @c man .TP
+@item drive_scsi_dev_family=sr|sdc|sg|default
+@kindex drive_scsi_dev_family=   Linux device type to be used
+@cindex Drive, Linux device type, drive_scsi_dev_family
+GNU/Linux specific:
+@*
+By default, cdrskin tries to map Linux drive addresses to /dev/sr* before
+they get opened for operating the drive. This coordinates well with
+other use cases of optical drives, like mount(8). But since year 2010
+all /dev/sr* share a global lock which allows only one drive to process
+an SCSI command while all others have to wait for its completion.
+This yields awful throughput if more than one drive is writing or reading
+simultaneously.
+@*
+The global lock is not applied to device files /dev/sg* and also not with
+the system calls read(2), write(2). But ioctl(SG_IO) is affected, which is
+needed to perform the SCSI commands for optical burning.
+@*
+So for simultaneous burn runs on modern GNU/Linux it is advisable to use
+drive_scsi_dev_family="sg". The drive addresses may then well be given as
+/dev/sr* but will nevertheless get used as /dev/sg*.
+@c man .TP
 @item @minus{}@minus{}grow_overwriteable_iso
 @kindex @minus{}@minus{}grow_overwriteable_iso   emulate ISO 9660 multi-session
 @cindex Multi-session, emulate ISO 9660, @minus{}@minus{}grow_overwriteable_iso
@@ -805,7 +826,8 @@ reaches a given low percentage value.
 This can ease the load on operating system and drive controller and thus help
 with achieving better input bandwidth if disk and burner are not on independent
 controllers (like hda and hdb). It may also help with simultaneous burns on
-different burners with Linux kernels like 3.16. On the other hand it increases
+different burners with Linux kernels like 3.16, if one has reason not to fix
+the problem by drive_scsi_dev_family="sg". On the other hand it increases
 the risk of buffer underflow and thus reduced write speed.
 @*
 Some burners are not suitable because they

xorriso/xorriso.1

@@ -9,7 +9,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH XORRISO 1 "Version 1.4.3, Feb 05, 2016"
+.TH XORRISO 1 "Version 1.4.3, Mar 18, 2016"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -304,6 +304,12 @@ the path of their block device or of their generic character device. E.g.
 .br
   \-dev /dev/sg2
 .br
+By default xorriso will try to map the given address to /dev/hd* and /dev/sr*.
+The command \-scsi_dev_family can redirect the mapping from sr to scd or sg.
+The latter does not suffer from the concurrency problems which plague /dev/sr
+of Linux kernels since version 3. But it does not yield the same addresses
+which are used by mount(8) or by open(2) for read(2).
+.br
 On FreeBSD the device files have names like
 .br
   \-dev /dev/cd0
@@ -678,6 +684,26 @@ apply. See above paragraph "Libburn drives".
 An empty address string "" gives up the current output drive
 without acquiring a new one. No writing is possible without an output drive.
 .TP
+\fB\-scsi_dev_family\fR "default"|"sr"|"scd"|"sg"
+GNU/Linux specific:
+.br
+By default, xorriso tries to map Linux drive addresses to /dev/sr* before
+they get opened for operating the drive. This coordinates well with
+other use cases of optical drives, like mount(8). But since year 2010
+all /dev/sr* share a global lock which allows only one drive to process
+an SCSI command while all others have to wait for its completion.
+This yields awful throughput if more than one drive is writing or reading
+simultaneously.
+The global lock is not applied to device files /dev/sg* and also not if
+the xorriso drive address is prepended by "stdio:".
+.br
+So for simultaneous burn runs on modern GNU/Linux it is advisable to perform
+\-scsi_dev_family "sg" before any \-dev, \-indev, or \-outdev. The drive addresses
+may then well be given as /dev/sr* but will nevertheless get used as /dev/sg*.
+.br
+If you decide so, consider to put the command into a global startup file like
+/etc/opt/xorriso/rc.
+.TP
 \fB\-grow_blindly\fR "off"|predicted_nwa
 If predicted_nwa is a non\-negative number then perform blind growing rather
 than modifying if \-indev and \-outdev are set to different drives.
@@ -2940,9 +2966,11 @@ reaches a given low percentage value.
 .br
 This can ease the load on operating system and drive controller and thus help
 with achieving better input bandwidth if disk and burner are not on independent
-controllers (like hda and hdb). It may also help with simultaneous burns on
-different burners with Linux kernels like 3.16. On the other hand it increases
-the risk of buffer underflow and thus reduced write speed.
+controllers (like hda and hdb). It may also help with throughput problems of
+simultaneous burns on different burners with Linux kernels like 3.16, if one
+has reason not to fix the problem by \-scsi_dev_family "sg".
+On the other hand it increases the risk of buffer underflow and thus
+reduced write speed.
 .br
 Some burners are not suitable because they
 report buffer fill with granularity too coarse in size or time,

xorriso/xorriso.h

@@ -1998,6 +1998,12 @@ int Xorriso_option_rr_reloc_dir(struct XorrisO *xorriso, char *name, int flag);
 /* @since 0.4.4 */
 int Xorriso_option_scdbackup_tag(struct XorrisO *xorriso, char *list_path,
                                  char *record_name, int flag);
+
+/* Command -scsi_dev_family */
+/* @since 1.4.4 */
+int Xorriso_option_scsi_dev_family(struct XorrisO *xorriso, char *mode,
+                                   int flag);
+
 /* Command -scsi_log */
 /* @since 0.5.0 */
 int Xorriso_option_scsi_log(struct XorrisO *xorriso, char *mode, int flag);

xorriso/xorriso.info

@@ -278,6 +278,12 @@ character device.  E.g.
 -dev /dev/sr0
 -dev /dev/hdc
 -dev /dev/sg2
+By default xorriso will try to map the given address to /dev/hd* and
+/dev/sr*.  The command -scsi_dev_family can redirect the mapping from sr
+to scd or sg.  The latter does not suffer from the concurrency problems
+which plague /dev/sr of Linux kernels since version 3.  But it does not
+yield the same addresses which are used by mount(8) or by open(2) for
+read(2).
 On FreeBSD the device files have names like
 -dev /dev/cd0
 On NetBSD:
@@ -626,6 +632,23 @@ acquire the drive.
      An empty address string "" gives up the current output drive
      without acquiring a new one.  No writing is possible without an
      output drive.
+-scsi_dev_family "default"|"sr"|"scd"|"sg"
+     GNU/Linux specific:
+     By default, xorriso tries to map Linux drive addresses to /dev/sr*
+     before they get opened for operating the drive.  This coordinates
+     well with other use cases of optical drives, like mount(8).  But
+     since year 2010 all /dev/sr* share a global lock which allows only
+     one drive to process an SCSI command while all others have to wait
+     for its completion.  This yields awful throughput if more than one
+     drive is writing or reading simultaneously.  The global lock is not
+     applied to device files /dev/sg* and also not if the xorriso drive
+     address is prepended by "stdio:".
+     So for simultaneous burn runs on modern GNU/Linux it is advisable
+     to perform -scsi_dev_family "sg" before any -dev, -indev, or
+     -outdev.  The drive addresses may then well be given as /dev/sr*
+     but will nevertheless get used as /dev/sg*.
+     If you decide so, consider to put the command into a global startup
+     file like /etc/opt/xorriso/rc.
 -grow_blindly "off"|predicted_nwa
      If predicted_nwa is a non-negative number then perform blind
      growing rather than modifying if -indev and -outdev are set to
@@ -2491,9 +2514,11 @@ according to the setting of command -acl.
      This can ease the load on operating system and drive controller and
      thus help with achieving better input bandwidth if disk and burner
      are not on independent controllers (like hda and hdb).  It may also
-     help with simultaneous burns on different burners with Linux
-     kernels like 3.16.  On the other hand it increases the risk of
-     buffer underflow and thus reduced write speed.
+     help with throughput problems of simultaneous burns on different
+     burners with Linux kernels like 3.16, if one has reason not to fix
+     the problem by -scsi_dev_family "sg".  On the other hand it
+     increases the risk of buffer underflow and thus reduced write
+     speed.
      Some burners are not suitable because they report buffer fill with
      granularity too coarse in size or time, or expect their buffer to
      be filled to the top before they go to full speed.
@@ -5096,7 +5121,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -chown sets ownership in ISO image:    Manip.               (line  43)
 * -chown_r sets ownership in ISO image:  Manip.               (line  47)
 * -clone copies ISO directory tree:      Insert.              (line 170)
-* -close controls media closing:         SetWrite.            (line 371)
+* -close controls media closing:         SetWrite.            (line 373)
 * -close_damaged closes damaged track and session: Writing.   (line 164)
 * -close_filter_list bans filter registration: Filter.        (line  50)
 * -commit writes pending ISO image:      Writing.             (line  27)
@@ -5125,7 +5150,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
                                                               (line  57)
 * -drive_class controls drive accessability: Loading.         (line  73)
 * -du show directory size in ISO image:  Navigate.            (line  75)
-* -dummy controls write simulation:      SetWrite.            (line 363)
+* -dummy controls write simulation:      SetWrite.            (line 365)
 * -dus show directory size in ISO image: Navigate.            (line  78)
 * -dusx show directory size on disk:     Navigate.            (line  85)
 * -dux show directory size on disk:      Navigate.            (line  81)
@@ -5149,13 +5174,13 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -follow softlinks and mount points:    SetInsert.           (line  69)
 * -format formats media:                 Writing.             (line  87)
 * -for_backup -acl,-xattr,-hardlinks,-md5: Loading.           (line 210)
-* -fs sets size of fifo:                 SetWrite.            (line 366)
+* -fs sets size of fifo:                 SetWrite.            (line 368)
 * -getfacl shows ACL in ISO image:       Navigate.            (line  60)
 * -getfacl_r shows ACL in ISO image:     Navigate.            (line  66)
 * -getfattr shows xattr in ISO image:    Navigate.            (line  69)
 * -getfattr_r shows xattr in ISO image:  Navigate.            (line  72)
 * -gid sets global ownership:            SetWrite.            (line 271)
-* -grow_blindly overides next writeable address: AqDrive.     (line  43)
+* -grow_blindly overides next writeable address: AqDrive.     (line  60)
 * -hardlinks controls handling of hard links: Loading.        (line 134)
 * -help prints help text:                Scripting.           (line  19)
 * -hfsplus enables production of HFS+ partition: SetWrite.    (line  14)
@@ -5211,7 +5236,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -out_charset sets output character set: SetWrite.           (line 263)
 * -overwrite enables overwriting in ISO: SetInsert.           (line 131)
 * -pacifier controls pacifier text form: Emulation.           (line 166)
-* -padding sets amount or mode of image padding: SetWrite.    (line 394)
+* -padding sets amount or mode of image padding: SetWrite.    (line 396)
 * -page set terminal geometry:           DialogCtl.           (line  18)
 * -paste_in copies file into disk file:  Restore.             (line 114)
 * -pathspecs sets meaning of = with -add: SetInsert.          (line 115)
@@ -5250,6 +5275,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -rom_toc_scan searches for sessions:   Loading.             (line 278)
 * -rr_reloc_dir sets name of relocation directory: SetWrite.  (line 144)
 * -scdbackup_tag enables scdbackup checksum tag: Emulation.   (line 179)
+* -scsi_dev_family choose Linux device file type: AqDrive.    (line  43)
 * -scsi_log reports SCSI commands:       Scripting.           (line 143)
 * -session_log logs written sessions:    Scripting.           (line 134)
 * -session_string composes session info line: Inquiry.        (line  73)
@@ -5272,7 +5298,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -split_size enables large file splitting: SetInsert.        (line 143)
 * -status shows current settings:        Scripting.           (line  44)
 * -status_history_max curbs -status history: Scripting.       (line  52)
-* -stdio_sync controls stdio buffer:     SetWrite.            (line 356)
+* -stdio_sync controls stdio buffer:     SetWrite.            (line 358)
 * -stream_recording controls defect management: SetWrite.     (line 303)
 * -system_id sets system id:             SetWrite.            (line 199)
 * -tell_media_space reports free space:  Inquiry.             (line  97)
@@ -5288,7 +5314,7 @@ File: xorriso.info,  Node: CommandIdx,  Next: ConceptIdx,  Prev: Legal,  Up: Top
 * -volid sets volume id:                 SetWrite.            (line 162)
 * -volset_id sets volume set id:         SetWrite.            (line 182)
 * -volume_date sets volume timestamp:    SetWrite.            (line 205)
-* -write_type chooses TAO or SAO/DAO:    SetWrite.            (line 387)
+* -write_type chooses TAO or SAO/DAO:    SetWrite.            (line 389)
 * -x enables automatic execution order of arguments: ArgSort. (line  16)
 * -xattr controls handling of xattr (EA): Loading.            (line 178)
 * -zisofs controls zisofs production:    SetWrite.            (line 274)
@@ -5453,6 +5479,7 @@ File: xorriso.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Jigdo Template Extraction, -jigdo:     Jigdo.               (line  33)
 * Jigdo Template Extraction, _definition: Jigdo.              (line   6)
 * LBA, _definition:                      Drives.              (line  17)
+* Linux device type, -scsi_dev_family:   AqDrive.             (line  43)
 * List delimiter, _definition:           Processing.          (line   9)
 * Local Character Set, _definition:      Charset.             (line  11)
 * MBR bootable/active flag, enforce:     Bootable.            (line 306)
@@ -5484,7 +5511,7 @@ File: xorriso.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Navigate, set ISO working directory, -cd: Navigate.         (line   7)
 * Navigate, tell disk working directory, -pwdx: Navigate.     (line  21)
 * Navigate, tell ISO working directory, -pwd: Navigate.       (line  19)
-* Next writeable address, -grow_blindly: AqDrive.             (line  43)
+* Next writeable address, -grow_blindly: AqDrive.             (line  60)
 * Output Character Set, _definition:     Charset.             (line  26)
 * Overwriteable media, _definition:      Media.               (line  14)
 * Ownership, global in ISO image, -uid:  SetWrite.            (line 268)
@@ -5578,24 +5605,24 @@ File: xorriso.info,  Node: ConceptIdx,  Prev: CommandIdx,  Up: Top
 * Verify, preset -check_media, -check_media_defaults: Verify. (line  40)
 * Write, block size, -dvd_obs:           SetWrite.            (line 314)
 * Write, bootability, -boot_image:       Bootable.            (line  65)
-* Write, buffer syncing, -stdio_sync:    SetWrite.            (line 356)
-* Write, close media, -close:            SetWrite.            (line 371)
+* Write, buffer syncing, -stdio_sync:    SetWrite.            (line 358)
+* Write, close media, -close:            SetWrite.            (line 373)
 * Write, compliance to specs, -compliance: SetWrite.          (line  56)
 * Write, defect management, -stream_recording: SetWrite.      (line 303)
 * Write, disable Rock Ridge, -rockridge: SetWrite.            (line  51)
 * Write, drive buffer, -modesty_on_drive: SetWrite.           (line 320)
 * Write, enable HFS+, -hfsplus:          SetWrite.            (line  14)
 * Write, enable Joliet, -joliet:         SetWrite.            (line  10)
-* Write, fifo size, -fs:                 SetWrite.            (line 366)
+* Write, fifo size, -fs:                 SetWrite.            (line 368)
 * Write, free space, -tell_media_space:  Inquiry.             (line  97)
 * Write, log problematic disk files, -errfile_log: Scripting. (line 116)
 * Write, log written sessions, -session_log: Scripting.       (line 134)
-* Write, padding image, -padding:        SetWrite.            (line 394)
+* Write, padding image, -padding:        SetWrite.            (line 396)
 * Write, pending ISO image, -commit:     Writing.             (line  27)
 * Write, predict image size, -print_size: Inquiry.            (line  85)
 * Write, set speed, -speed:              SetWrite.            (line 285)
-* Write, simulation, -dummy:             SetWrite.            (line 363)
-* Write, TAO or SAO/DAO, -write_type:    SetWrite.            (line 387)
+* Write, simulation, -dummy:             SetWrite.            (line 365)
+* Write, TAO or SAO/DAO, -write_type:    SetWrite.            (line 389)
 * xattr, control handling, -xattr:       Loading.             (line 178)
 * xattr, set in ISO image, -setfattr:    Manip.               (line 103)
 * xattr, set in ISO image, -setfattr_list: Manip.             (line 117)
@@ -5613,54 +5640,54 @@ Node: Model3406
 Node: Media6310
 Node: Methods8997
 Node: Drives11583
-Node: Extras15160
-Node: Processing19628
-Node: Dialog23263
-Node: Commands24952
-Node: ArgSort26629
-Node: AqDrive28123
-Node: Loading31178
-Node: Insert51285
-Node: SetInsert61869
-Node: Manip71188
-Node: CmdFind80971
-Node: Filter99274
-Node: Writing103896
-Node: SetWrite114053
-Node: Bootable136997
-Node: Jigdo160791
-Node: Charset165050
-Node: Exception168377
-Node: DialogCtl174506
-Node: Inquiry177108
-Node: Navigate185558
-Node: Verify193853
-Node: Restore203730
-Node: Emulation212343
-Node: Scripting222753
-Node: Frontend230535
-Node: Examples240170
-Node: ExDevices241348
-Node: ExCreate242009
-Node: ExDialog243309
-Node: ExGrowing244580
-Node: ExModifying245389
-Node: ExBootable245899
-Node: ExCharset246454
-Node: ExPseudo247350
-Node: ExCdrecord248277
-Node: ExMkisofs248597
-Node: ExGrowisofs249954
-Node: ExException251108
-Node: ExTime251566
-Node: ExIncBackup252024
-Node: ExRestore256050
-Node: ExRecovery256996
-Node: Files257568
-Node: Seealso258902
-Node: Bugreport259617
-Node: Legal260208
-Node: CommandIdx261220
-Node: ConceptIdx278262
+Node: Extras15525
+Node: Processing19993
+Node: Dialog23628
+Node: Commands25317
+Node: ArgSort26994
+Node: AqDrive28488
+Node: Loading32589
+Node: Insert52696
+Node: SetInsert63280
+Node: Manip72599
+Node: CmdFind82382
+Node: Filter100685
+Node: Writing105307
+Node: SetWrite115464
+Node: Bootable138508
+Node: Jigdo162302
+Node: Charset166561
+Node: Exception169888
+Node: DialogCtl176017
+Node: Inquiry178619
+Node: Navigate187069
+Node: Verify195364
+Node: Restore205241
+Node: Emulation213854
+Node: Scripting224264
+Node: Frontend232046
+Node: Examples241681
+Node: ExDevices242859
+Node: ExCreate243520
+Node: ExDialog244820
+Node: ExGrowing246091
+Node: ExModifying246900
+Node: ExBootable247410
+Node: ExCharset247965
+Node: ExPseudo248861
+Node: ExCdrecord249788
+Node: ExMkisofs250108
+Node: ExGrowisofs251465
+Node: ExException252619
+Node: ExTime253077
+Node: ExIncBackup253535
+Node: ExRestore257561
+Node: ExRecovery258507
+Node: Files259079
+Node: Seealso260413
+Node: Bugreport261128
+Node: Legal261719
+Node: CommandIdx262731
+Node: ConceptIdx279846
 
 End Tag Table

xorriso/xorriso.texi

@@ -50,7 +50,7 @@
 @c man .\" First parameter, NAME, should be all caps
 @c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 @c man .\" other parameters are allowed: see man(7), man(1)
-@c man .TH XORRISO 1 "Version 1.4.3, Feb 05, 2016"
+@c man .TH XORRISO 1 "Version 1.4.3, Mar 18, 2016"
 @c man .\" Please adjust this date whenever revising the manpage.
 @c man .\"
 @c man .\" Some roff macros, for reference:
@@ -434,6 +434,12 @@ the path of their block device or of their generic character device. E.g.
 @*
   -dev /dev/sg2
 @*
+By default xorriso will try to map the given address to /dev/hd* and /dev/sr*.
+The command -scsi_dev_family can redirect the mapping from sr to scd or sg.
+The latter does not suffer from the concurrency problems which plague /dev/sr
+of Linux kernels since version 3. But it does not yield the same addresses
+which are used by mount(8) or by open(2) for read(2).
+@*
 On FreeBSD the device files have names like
 @*
   -dev /dev/cd0
@@ -890,6 +896,29 @@ apply. See above paragraph "Libburn drives".
 An empty address string "" gives up the current output drive
 without acquiring a new one. No writing is possible without an output drive.
 @c man .TP
+@item -scsi_dev_family "default"|"sr"|"scd"|"sg"
+@kindex -scsi_dev_family   choose Linux device file type
+@cindex Linux device type, -scsi_dev_family
+GNU/Linux specific:
+@*
+By default, xorriso tries to map Linux drive addresses to /dev/sr* before
+they get opened for operating the drive. This coordinates well with
+other use cases of optical drives, like mount(8). But since year 2010
+all /dev/sr* share a global lock which allows only one drive to process
+an SCSI command while all others have to wait for its completion.
+This yields awful throughput if more than one drive is writing or reading
+simultaneously.
+The global lock is not applied to device files /dev/sg* and also not if
+the xorriso drive address is prepended by "stdio:".
+@*
+So for simultaneous burn runs on modern GNU/Linux it is advisable to perform
+-scsi_dev_family "sg" before any -dev, -indev, or -outdev. The drive addresses
+may then well be given as /dev/sr* but will nevertheless get used as
+the matching /dev/sg*.
+@*
+If you decide so, consider to put the command into a global startup file like
+/etc/opt/xorriso/rc.
+@c man .TP
 @item -grow_blindly "off"|predicted_nwa
 @kindex -grow_blindly   overides next writeable address
 @cindex Next writeable address, -grow_blindly
@@ -3446,9 +3475,11 @@ reaches a given low percentage value.
 @*
 This can ease the load on operating system and drive controller and thus help
 with achieving better input bandwidth if disk and burner are not on independent
-controllers (like hda and hdb). It may also help with simultaneous burns on
-different burners with Linux kernels like 3.16. On the other hand it increases
-the risk of buffer underflow and thus reduced write speed.
+controllers (like hda and hdb). It may also help with throughput problems of
+simultaneous burns on different burners with Linux kernels like 3.16, if one
+has reason not to fix the problem by -scsi_dev_family "sg".
+On the other hand it increases the risk of buffer underflow and thus
+reduced write speed.
 @*
 Some burners are not suitable because they
 report buffer fill with granularity too coarse in size or time,

xorriso/xorriso_private.h

@@ -282,6 +282,8 @@ struct XorrisO { /* the global context of xorriso */
 
  int drives_exclusive;   /* burn_preset_device_open() param exclusive */
 
+ int linux_scsi_dev_family; /* 0= default, 1= sr, 2= scd, (3= st), 4= sg */
+
  int early_stdio_test;   /* For burn_allow_drive_role_4():
                             bit1= Test whether a stdio drive can be opened for
                                   read-write resp. read-only resp. write only.

xorriso/xorriso_timestamp.h

@@ -1 +1 @@
-#define Xorriso_timestamP "2016.03.15.203626"
+#define Xorriso_timestamP "2016.03.18.135548"

xorriso/xorrisoburn.h

@@ -622,6 +622,8 @@ int Xorriso_hfsplus_bless(struct XorrisO *xorriso, char *path,
 
 int Xorriso_pretend_full_disc(struct XorrisO *xorriso, int flag);
 
+int Xorriso_scsi_dev_family(struct XorrisO *xorriso, int flag);
+
 
 int Xorriso_apply_sort_file(struct XorrisO *xorriso, char *path, int flag);