FW: can't mount multi-session DVD-R

[Moshe Kaminsky <kaminsky@math.huji.ac.il>]

Hi,

I've sent the following message to my distro's ML, but got no answer. I 
believe the problem is with the mounting, not the burning, since I can 
read the dvd on windows. Also, I believe it might be related to the size 
of the first session, which is about 2.5G, since for small sessions, 
everything works.

I hope someone can help me.
Please add my address if you reply, I'm not subscribed.

Thanks,
Moshe

----- Forwarded message from Moshe Kaminsky <kaminsky@math.huji.ac.il> -----

Date: Fri, 2 Jul 2004 12:24:15 +0300
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From: Moshe Kaminsky <kaminsky@math.huji.ac.il>
To: Gentoo users <gentoo-user@lists.gentoo.org>
Subject: can't mount multi-session DVD-R

Hi,

I tried burning a multi-session dvd-r, but when I try to mount it, I 
fail. The error message I get is:

mount: wrong fs type, bad option, bad superblock on /dev/cdroms/cdrom0,
       or too many mounted file systems

This happens with both iso9660 and udf. For iso9660, I get the following 
lines in /var/log/messages (twice):

Jul  2 11:41:51 kaminsky Session 2 start 1151849 type 4
Jul  2 11:41:55 kaminsky Unable to identify CD-ROM format.

For udf, I get:

Jul  2 12:06:13 kaminsky attempt to access beyond end of device
Jul  2 12:06:13 kaminsky hdc: rw=0, want=4291186152, limit=5207808
Jul  2 12:06:18 kaminsky UDF-fs: No partition found (1)

When I burn only one session, everything is fine (both for iso9660 and 
udf).

The commands I use for burning are:

nice -n -20 growisofs -R -Z /dev/cdroms/cdrom0 /opt/tmp/backup_010704.1.dar
nice -n -20 growisofs -R -M /dev/cdroms/cdrom0 servers.1

(for udf I use the same but with an additional -udf option). The output 
of these command does not indicate any error.

I also have the following messages in /var/log/messages, which might be 
related:

Jul  2 10:43:37 kaminsky end_request: I/O error, dev hdc, sector 1048
Jul  2 10:43:37 kaminsky Buffer I/O error on device hdc, logical block 262
Jul  2 10:43:37 kaminsky lost page write due to I/O error on hdc

Theses are repeated many time.

I'm using kernel 2.6.7-gentoo-r8. I have the following option in the 
kernel ,config:

CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_ZISOFS_FS=m
CONFIG_UDF_FS=m

I believe this is all the relevant info. Any help is appreciated.

Thanks,
Moshe




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    Moshe Kaminsky <kaminsky@math.huji.ac.il>

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