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Changed prescription for safe loading of tray before xorrisofs add-on session

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This commit is contained in:
Thomas Schmitt
2018-11-11 14:43:43 +01:00
parent ff68bda006
commit b8ee16af4a
9 changed files with 286 additions and 186 deletions
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34
xorriso/xorriso.texi
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@ -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 1.5.1, Nov 01, 2018"
@c man .TH XORRISO 1 "Version 1.5.1, Nov 11, 2018"
@c man .\" Please adjust this date whenever revising the manpage.
@c man .\"
@c man .\" Some roff macros, for reference:
@ -6759,26 +6759,38 @@ $ xorriso -as mkisofs prepared_for_iso/tree1 | \
xorriso -as cdrecord -v dev=/dev/sr0 blank=fast -multi -eject -
@*
@sp 1
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):
@*
@sp 1
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
@*
$ m=$(xorriso -as cdrecord dev=/dev/sr0 -msinfo)
@*
$ dd if=/dev/sr0 count=1 >/dev/null 2>&1
@*
$ xorriso -as mkisofs -M /dev/sr0 -C $m prepared_for_iso/tree2 | \
@*
xorriso -as cdrecord -v dev=/dev/sr0 -waiti -multi -eject -
@*
@sp 1
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.
Always eject the drive tray between sessions.
@*
For the same reason do not let @command{xorriso} -as cdrecord load the medium,
but rather do this manually or by a program that reads from /dev/sr0.
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.
@*
@sp 1
This example works for multi-session media only.