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

xorriso/xorriso.info

@@ -4882,20 +4882,30 @@ The first session is written like this:
    $ xorriso -as mkisofs 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
 $ xorriso -as mkisofs -M /dev/sr0 -C $m 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.
 
    This example works for multi-session media only.  Add cdrskin option
 --grow_overwriteable_iso to all -as cdrecord runs in order to enable
@@ -5849,18 +5859,18 @@ Node: ExCharset256742
 Node: ExPseudo257638
 Node: ExCdrecord258565
 Node: ExMkisofs258885
-Node: ExGrowisofs260242
-Node: ExException261396
-Node: ExTime261854
-Node: ExIncBackup262312
-Node: ExRestore266338
-Node: ExRecovery267284
-Node: Files267856
-Node: Environ269190
-Node: Seealso269899
-Node: Bugreport270616
-Node: Legal271207
-Node: CommandIdx272219
-Node: ConceptIdx289553
+Node: ExGrowisofs260783
+Node: ExException261937
+Node: ExTime262395
+Node: ExIncBackup262853
+Node: ExRestore266879
+Node: ExRecovery267825
+Node: Files268397
+Node: Environ269731
+Node: Seealso270440
+Node: Bugreport271157
+Node: Legal271748
+Node: CommandIdx272760
+Node: ConceptIdx290094
 
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