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