On Sun, 20 Sep 2009, Zaphod Beeblebrox wrote:
FreeBSD lightning 7.2-STABLE FreeBSD 7.2-STABLE #0: Sun Sep 20 07:25:58 MDT
2009 r...@lightning:/usr/obj/usr/src/sys/LIGHTNING i386
Now growisofs starts, but appears to never manage to write to the DVD. It's
a DVD-R, one from the same batch that has worked before:
0.77% done, estimate finish Sun Sep 20 07:55:57 2009
and there it stops. Rebooting is needed, and the machine can't quite bring
itself to shut down after syncing buffers. /var/log/messages:
Sep 20 07:42:44 lightning kernel: acd0: FAILURE - READ_BUFFER ILLEGAL
REQUEST as c=0x24 ascq=0x00
Sep 20 07:42:46 lightning kernel: acd0: FAILURE - MODE_SELECT_BIG ILLEGAL
REQUEST asc=0x24 ascq=0x00
Sep 20 07:42:56 lightning kernel: acd0: FAILURE - READ_TOC ILLEGAL REQUEST
asc=0x24 ascq=0x00
Sep 20 07:43:25 lightning kernel: acd0: WARNING - TEST_UNIT_READY taskqueue
time out - completing request directly
Sep 20 07:43:36 lightning kernel: acd0: WARNING - TEST_UNIT_READY freeing
taskqueue zombie request
Sep 20 07:45:26 lightning kernel: acd0: WARNING - PREVENT_ALLOW taskqueue
timeout - completing request directly
Sep 20 07:45:26 lightning kernel: acd0: WARNING - PREVENT_ALLOW freeing
taskqueue zombie request
I recently upgraded from 7.0 to 7.2-p3. I just last night cut a dual layer
DVD with growisofs. It appears to have cut fine.
When growisofs stops in the middle like that, it's often caused by media
defects. Have you tried another disk?
Yes, same effect. Also with a DVD+R. Also tried it on 8-STABLE, same
messages, same results.
Another possibility is that the drive is worn out. DVD writers have a
limited lifespan largely measured by the number of disks they cut.
This drive has probably written under 50 DVDs, all ISOs used for backup.
It's a Lite-On DH-20A4P bought in August 2008. It's looking like the
drive itself has failed. Which seems odd, since I thought it could
still burn CDs.
-Warren Block * Rapid City, South Dakota USA
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