Changed prescription for safe loading of tray before xorrisofs add-on session
This commit is contained in:
@ -205,12 +205,7 @@ then a new image is composed from scratch.
|
||||
superblock address on the intended medium.
|
||||
Both values can be inquired from optical media by help of burn
|
||||
programs and cdrecord option -msinfo. xorriso itself can obtain it
|
||||
in its cdrecord emulation. Do not let it load the drive, but
|
||||
rather do this manually or by a program like dd which reads a few
|
||||
bytes. Only then it is sure that the device driver knows the true
|
||||
readable size of the medium.
|
||||
|
||||
dd if=/dev/... count=1 >/dev/null 2>&1
|
||||
in its cdrecord emulation.
|
||||
values=$(xorriso -as cdrecord dev=/dev/... -msinfo)
|
||||
echo $values
|
||||
|
||||
@ -1530,21 +1525,31 @@ The first session is written like this:
|
||||
/tree1=prepared_for_iso/tree1 \
|
||||
| xorriso -as cdrecord -v dev=/dev/sr0 blank=fast -multi -eject -
|
||||
|
||||
Follow-up sessions are written like this:
|
||||
Follow-up sessions are written like this (the run of dd is only to
|
||||
give demons a chance to spoil it):
|
||||
|
||||
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
|
||||
$ m=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
|
||||
$ m=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
|
||||
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
|
||||
$ xorrisofs -M /dev/sr0 -C $m -graft-points \
|
||||
/tree2=prepared_for_iso/tree2 \
|
||||
| xorriso -as cdrecord -v dev=/dev/sr0 -waiti -multi -eject -
|
||||
|
||||
Always eject the drive tray between sessions. The old sessions get
|
||||
read via /dev/sr0. Its device driver might not be aware of the changed
|
||||
content before it loads the medium again. In this case the previous
|
||||
session would not be loaded and the new session would contain only the
|
||||
newly added files.
|
||||
For the same reason do not let xorriso -as cdrecord load the medium, but
|
||||
rather do this manually or by a program that reads from /dev/sr0.
|
||||
Always eject the drive tray between sessions.
|
||||
The run of xorriso -as mkisofs will read old sessions via the CD-ROM
|
||||
driver of /dev/sr0. This driver might not be aware of the changed
|
||||
content as long as the medium is not loaded again. In this case the
|
||||
previous session would not be properly assessed by xorriso and the new
|
||||
session would contain only the newly added files.
|
||||
Some systems have not enough patience with automatic tray loading and
|
||||
some demons may interfere with a first CD-ROM driver read attempt from a
|
||||
freshly loaded medium.
|
||||
When loading the tray manually, wait 10 seconds after the drive has
|
||||
stopped blinking.
|
||||
A safe automatic way seems to be a separate run of xorriso for loading
|
||||
the tray with proper waiting, and a subsequent run of dd which shall
|
||||
offer itself to any problems caused by demons assessing the changed
|
||||
drive status. If this does not help, insert a run of "sleep 10" between
|
||||
xorriso and dd.
|
||||
|
||||
|
||||
File: xorrisofs.info, Node: ExGrowisofs, Next: ExIncBackup, Prev: ExMkisofs, Up: Examples
|
||||
@ -1597,11 +1602,11 @@ get excluded explicitly.
|
||||
the two disk trees to the medium is desired. Begin with a blank medium
|
||||
and update it until he run fails gracefully due to lack of remaining
|
||||
space on the old one.
|
||||
Do not let xorriso -as cdrecord load the medium, but rather do this
|
||||
manually or by a program that reads from /dev/sr0.
|
||||
Always eject the drive tray between sessions. A run of dd shall give
|
||||
demons a chance to spoil the first read on freshly loaded media.
|
||||
|
||||
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
|
||||
$ msinfo=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
|
||||
$ msinfo=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
|
||||
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
|
||||
$ load_opts=
|
||||
$ test -n "$msinfo" && load_opts="-M /dev/sr0 -C $msinfo"
|
||||
$ xorrisofs $load_opts -o - --for_backup -m '*.o' -m '*.swp' \
|
||||
@ -1676,11 +1681,11 @@ With the first session:
|
||||
|
||||
With the second session, option -old-root refers to /session1 and the
|
||||
new -root is /session2.
|
||||
Do not let xorriso -as cdrecord load the medium, but rather do this
|
||||
manually or by a program that reads from /dev/sr0.
|
||||
Always eject the drive tray between sessions. A run of dd shall give
|
||||
demons a chance to spoil the first read on freshly loaded media.
|
||||
|
||||
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
|
||||
$ msinfo=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
|
||||
$ msinfo=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
|
||||
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
|
||||
$ load_opts=
|
||||
$ test -n "$msinfo" && load_opts="-M /dev/sr0 -C $msinfo"
|
||||
$ xorrisofs $load_opts -root /session2 -old-root /session1 \
|
||||
@ -1989,7 +1994,7 @@ File: xorrisofs.info, Node: CommandIdx, Next: ConceptIdx, Prev: Legal, Up: T
|
||||
* -c El Torito boot catalog name: Bootable. (line 114)
|
||||
* -C set load address and write address offset: Loading. (line 25)
|
||||
* -cdrecord-params set load address and write address offset: Loading.
|
||||
(line 46)
|
||||
(line 41)
|
||||
* -checksum_algorithm_iso choose .jigdo checksums: Jigdo. (line 72)
|
||||
* -checksum_algorithm_template choose .template checksums: Jigdo.
|
||||
(line 78)
|
||||
@ -2387,31 +2392,31 @@ Node: Insert3770
|
||||
Node: Xorriso5616
|
||||
Node: Options6762
|
||||
Node: Loading7489
|
||||
Node: SetInsert9789
|
||||
Node: SetProduct14198
|
||||
Node: SetCompl19769
|
||||
Node: SetExtras22361
|
||||
Node: SetHide33656
|
||||
Node: ImageId34960
|
||||
Node: Bootable39242
|
||||
Node: SystemArea45528
|
||||
Node: Charset62894
|
||||
Node: Jigdo63919
|
||||
Node: Miscellaneous68196
|
||||
Node: Examples69841
|
||||
Node: ExSimple70335
|
||||
Node: ExGraft70818
|
||||
Node: ExMkisofs72118
|
||||
Node: ExGrowisofs73384
|
||||
Node: ExIncBackup74574
|
||||
Node: ExIncBckAcc77735
|
||||
Node: ExBootable79424
|
||||
Node: Files83606
|
||||
Node: Environ84701
|
||||
Node: Seealso85472
|
||||
Node: Bugreport86123
|
||||
Node: Legal86716
|
||||
Node: CommandIdx87613
|
||||
Node: ConceptIdx103480
|
||||
Node: SetInsert9531
|
||||
Node: SetProduct13940
|
||||
Node: SetCompl19511
|
||||
Node: SetExtras22103
|
||||
Node: SetHide33398
|
||||
Node: ImageId34702
|
||||
Node: Bootable38984
|
||||
Node: SystemArea45270
|
||||
Node: Charset62636
|
||||
Node: Jigdo63661
|
||||
Node: Miscellaneous67938
|
||||
Node: Examples69583
|
||||
Node: ExSimple70077
|
||||
Node: ExGraft70560
|
||||
Node: ExMkisofs71860
|
||||
Node: ExGrowisofs73669
|
||||
Node: ExIncBackup74859
|
||||
Node: ExIncBckAcc78036
|
||||
Node: ExBootable79741
|
||||
Node: Files83923
|
||||
Node: Environ85018
|
||||
Node: Seealso85789
|
||||
Node: Bugreport86440
|
||||
Node: Legal87033
|
||||
Node: CommandIdx87930
|
||||
Node: ConceptIdx103797
|
||||
|
||||
End Tag Table
|
||||
|
||||
Reference in New Issue
Block a user