Multisession CD's and DVD's under OpenBSD.
- From: George Orwell <nobody@xxxxxxxxxxxx>
- Date: Sun, 4 Feb 2007 16:38:56 +0100 (CET)
I've used scripts to burn CD's and DVD's under OpenBSD
for quite some time now. I've burned over 300 multisession
CDR's and DVD+R's under OpenBSD , i've never lost any data and
i've never been unable to read any multisession disk that I
have appended sessions to.
I have noticed two recurring annoyances , after the second or
third session has been written , permissions default to r-x r-x r-x
and the actual number of sessions that can be appended to a
particular disk varies. I believe the permissions issue may relate
to a known flaw in older versions of cdrecord , I do not know for
certain , it could be something entirely different. The cdrecord
issue that had affected many seemed to be caused by a problem related
to the reading of an original session's permissions after a number
of subsequent sessions had been written. I assume the variable number
of sessions that can be written is due to some OpenBSD-specific issue.
I almost always get at least 10 or so sessions , I frequently get perhaps
25 to 30 sessions , and sometimes I can get 40 to 50 sessions per disk.
When additional sessions cannot be appended I usually receive some sort of
unable to locate track error-message.
I have attached some modified versions of the scripts I use to burn various
types of disks. I find multisession disks to be extremely convenient
and economical to use. I use multisession disks for data. I run my scripts
as root and use a dedicated subdirectory that is used for holding data
intended for burning. You'll need to modify my scripts to include the
directory you wish to use and if you want the resulting disks to be compatible
with non-Unix/unix-like OS's. I should have only modified these by removing
references to my directory-structure , please check and make sure I didn't make any
obvious mistakes while doing this. These scripts were used on i386 machines
and are presently set to use my second optical drive which uses rcd1c.
I have used these scripts for some two years , with only the mentioned annoyances.
For most of this time I have been using LG "Multi-drives" , I am presently using two
rather excellent LG GSA-4163B's. I have previously used LG GSA-4120B's.
If anyone has better scripts or knows how to correct for the annoyances please
let me know. I recall reading that someone within OpenBSD might have been
working on related issues. ??
I don't usually finalize my multisession disks , so these particular scripts
may or may not work well. I haven't used these two scripts as regularly as I
have the others.
It is my hope that someone might find these interesting or useful.
An Odd User.
#!/bin/sh
########## start-cd-MULTISESSION ##########
/usr/local/bin/mkisofs -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -new-dir-mode 0500 -iso-level 3 -o /yourdirectoryhere/cd9660.tmp /yourdirectoryhere/
/usr/local/bin/cdrecord -v gracetime=10 driveropts=burnfree -multi -tao speed=16 dev=/dev/rcd1c /yourdirectoryhere/cd9660.tmp
/bin/rm -f -P /yourdirectoryhere/cd9660.tmp
#!/bin/sh
########## continue-cd-MULTISESSION ##########
MSINFO=`/usr/local/bin/cdrecord dev=/dev/rcd1c -msinfo`
/usr/local/bin/mkisofs -M /dev/rcd1c -C $MSINFO -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -new-dir-mode 0500 -iso-level 3 -o /yourdirectoryhere/cd9660.tmp /yourdirectoryhere/
/usr/local/bin/cdrecord -v gracetime=10 driveropts=burnfree -multi -tao speed=16 dev=/dev/rcd1c /yourdirectoryhere/cd9660.tmp
/bin/rm -f -P /yourdirectoryhere/cd9660.tmp
#!/bin/sh
########## finalize-cd-MULTISESSION ##########
MSINFO=`/usr/local/bin/cdrecord dev=/dev/rcd1c -msinfo`
/usr/local/bin/mkisofs -M /dev/rcd1c -C $MSINFO -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -new-dir-mode 0500 -iso-level 3 -o /yourdirectoryhere/cd9660.tmp /yourdirectoryhere/
/usr/local/bin/cdrecord -v gracetime=10 driveropts=burnfree -tao speed=16 dev=/dev/rcd1c /yourdirectoryhere/cd9660.tmp
/bin/rm -f -P /yourdirectoryhere/cd9660.tmp
#!/bin/sh
########## start-dvd-MULTISESSION ##########
/usr/local/bin/growisofs -Z /dev/rcd1c -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -new-dir-mode 0500 -iso-level 3 -speed=8 /yourdirectoryhere/
#!/bin/sh
########## continue-dvd-MULTISESSION ##########
/usr/local/bin/growisofs -M /dev/rcd1c -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -new-dir-mode 0500 -iso-level 3 -speed=8 /yourdirectoryhere/
#!/bin/sh
########## finalize-dvd-MULTISESSION ##########
/usr/local/bin/growisofs -M -dvd-compat /dev/rcd1c -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -new-dir-mode 0500 -iso-level 3 -speed=8 /yourdirectoryhere/
#!/bin/sh
########## write-cd-SINGLESESSION ##########
/usr/local/bin/mkisofs -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -iso-level 3 -o /yourdirectoryhere/cd9660.tmp /yourdirectoryhere/
/usr/local/bin/cdrecord -v gracetime=10 driveropts=burnfree -data -dao speed=16 dev=/dev/rcd1c /yourdirectoryhere/cd9660.tmp
/bin/rm -f -P /yourdirectoryhere/cd9660.tmp
#!/bin/sh
########## write-cd-SINGLESESSION-JOLIET ##########
/usr/local/bin/mkisofs -R -J -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -iso-level 2 -o /yourdirectoryhere/cd9660.tmp /yourdirectoryhere/
/usr/local/bin/cdrecord -v gracetime=10 driveropts=burnfree -data -dao speed=16 dev=/dev/rcd1c /yourdirectoryhere/cd9660.tmp
/bin/rm -f -P /yourdirectoryhere/cd9660.tmp
#!/bin/sh
########## write-dvd-SINGLESESSION ##########
/usr/local/bin/growisofs -Z -dvd-compat /dev/rcd1c -R -uid 0 -gid 0 -file-mode 0500 -dir-mode 0500 -iso-level 3 -speed=8 /yourdirectoryhere/
#!/bin/sh
########## write-cd-ISO-IMAGE ##########
/usr/local/bin/cdrecord -v gracetime=10 driveropts=burnfree -data -dao speed=16 dev=/dev/rcd1c /yourdirectoryhere/*
.
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