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