Date: 25 Jul 2002 08:31:12 -0400 From: Chris Shenton <chris@shenton.org> To: questions@freebsd.org, multimedia@freebsd.org Subject: PhotoCD: ata/acd mount issue, data overrun with lockup Message-ID: <87d6tcgfan.fsf@thanatos.shenton.org>
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A friend gave me a CD burned by a film processing lab and I had
problems mounting or dd'ing it off:
thanatos# mount /dev/acd0a /cdrom
mount: /dev/acd0a on /cdrom: incorrect super block
thanatos# mount_msdos /dev/acd0a /cdrom
mount_msdos: /dev/acd0a: Invalid argument
thanatos# mount_cd9660 /dev/acd0a /cdrom
mount_cd9660: /dev/acd0a: Invalid argument
thanatos# dd if=/dev/acd0c of=/tmp/cdnoise
dd: /dev/acd0c: Invalid argument
0+0 records in
0+0 records out
0 bytes transferred in 0.000214 secs (0 bytes/sec)
I was finally able to mount it per the hint on the mount_cd9660 man
page with:
thanatos# mount_cd9660 -o rw -v -s 0 /dev/acd0c /cdrom/
Under my mount point I see (most importantly) directories "pictures"
and "previews", the former with a bunch of 3MB files, the latter with
a directory for each roll and files in the 75KB range.
But when I try to view the large images with xv, or even use "cp" to
copy them to disk, I see lots of problems in the logs and it tends to
hang my system intermittently (comes back, but during the hang even
the mouse is frozen):
chris@thanatos(259> cp /cdrom/pictures/ku6553-r1-0a.jpg ./
Jul 25 08:14:57 thanatos /kernel: acd0: READ_BIG command timeout - resetting
Jul 25 08:14:57 thanatos /kernel: ata2: resetting devices .. done
Jul 25 08:14:58 thanatos /kernel: acd0: read data overrun 63488/0
This causes xv to take about 15 minutes to pull up one of the 3MB
large pictures, and rendered the computer mostly useless during that
time. Vitals from dmesg:
FreeBSD 4.6-STABLE #12: Wed Jul 3 11:08:15 EDT 2002
chris@thanatos.shenton.org:/usr/obj/usr/src/sys/Thanatos
acd0: CD-RW <SONY CD-RW CRX140E> at ata2-slave PIO4
Is there a problem I can fix here?
Thanks.
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