Buffer I/O error on device sr0 Logical Block in Karmic Koala 9.10 64 bit server with RAID

[g.random]

As described in the very related bug 266951 there are - spurious? - errors about device sr0.
This happens is in the current released 9.10 server 64bit release with no patches and little other than a lot of packages installed.

Circumstances: I just tried to install X/kde - which seems to fail due with X but that is an other problem.

#uname -a
Linux quadratur 2.6.31-14-server #48-Ubuntu SMP Fri Oct 16 15:07:34 UTC 2009 x86_64 GNU/Linux

The log:
Mar 1 13:17:01 quadratur CRON[4886]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Mar 1 13:23:45 quadratur console-kit-daemon[4930]: WARNING: Failed to acquire org.freedesktop.ConsoleKit: Connection ":1.7" is not allowed to own the service "org.freedesktop.ConsoleKit" due to security policies in the configuration file
Mar 1 13:23:45 quadratur console-kit-daemon[4930]: WARNING: Could not acquire name; bailing out
Mar 1 13:26:53 quadratur mdadm[1516]: Rebuild80 event detected on md device /dev/md0
Mar 1 13:39:02 quadratur CRON[7208]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
Mar 1 13:49:38 quadratur console-kit-daemon[7682]: WARNING: Failed to acquire org.freedesktop.ConsoleKit: Connection ":1.9" is not allowed to own the service "org.freedesktop.ConsoleKit" due to security policies in the configuration file

[...]

Mar 1 12:26:49 quadratur mdadm[1516]: Rebuild40 event detected on md device /dev/md0
Mar 1 14:04:01 quadratur kernel: [ 7698.975907] md: md0: resync done.
Mar 1 14:04:02 quadratur kernel: [ 7699.512976] RAID10 conf printout:
Mar 1 14:04:02 quadratur kernel: [ 7699.512982] --- wd:4 rd:4
Mar 1 14:04:02 quadratur kernel: [ 7699.512988] disk 0, wo:0, o:1, dev:sda2
Mar 1 14:04:02 quadratur kernel: [ 7699.512993] disk 1, wo:0, o:1, dev:sdb2
Mar 1 14:04:02 quadratur kernel: [ 7699.512997] disk 2, wo:0, o:1, dev:sdc2
Mar 1 14:04:02 quadratur kernel: [ 7699.513000] disk 3, wo:0, o:1, dev:sdd2
Mar 1 14:04:02 quadratur mdadm[1516]: RebuildFinished event detected on md device /dev/md0, component device mismatches found: 326144
Mar 1 14:04:02 quadratur mdadm[1516]: RebuildFinished event detected on md device /dev/md0, component device mismatches found: 326144
Mar 1 14:09:01 quadratur CRON[8061]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm)
Mar 1 14:16:28 quadratur dbus-daemon: Reloaded configuration
Mar 1 14:16:31 quadratur dbus-daemon: Reloaded configuration
Mar 1 14:16:55 quadratur dbus-daemon: Reloaded configuration
Mar 1 14:16:55 quadratur dbus-daemon: Reloaded configuration
Mar 1 14:17:00 quadratur kernel: [ 8476.161505] sr 8:0:0:0: [sr0] Unhandled sense code
Mar 1 14:17:00 quadratur kernel: [ 8476.161510] sr 8:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Mar 1 14:17:00 quadratur kernel: [ 8476.161515] sr 8:0:0:0: [sr0] Sense Key : Medium Error [current]
Mar 1 14:17:00 quadratur kernel: [ 8476.161521] sr 8:0:0:0: [sr0] Add. Sense: No seek complete
Mar 1 14:17:00 quadratur kernel: [ 8476.161527] end_request: I/O error, dev sr0, sector 1340440
Mar 1 14:17:00 quadratur kernel: [ 8476.161587] Buffer I/O error on device sr0, logical block 167555
Mar 1 14:17:01 quadratur kernel: [ 8477.319545] sr 8:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Mar 1 14:17:01 quadratur kernel: [ 8477.319551] sr 8:0:0:0: [sr0] Sense Key : Illegal Request [current]
Mar 1 14:17:01 quadratur kernel: [ 8477.319557] sr 8:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Mar 1 14:17:01 quadratur kernel: [ 8477.319564] end_request: I/O error, dev sr0, sector 1340440
Mar 1 14:17:01 quadratur kernel: [ 8477.319624] Buffer I/O error on device sr0, logical block 167555
Mar 1 14:17:01 quadratur CRON[11685]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
[...]

Please note that I have a RAID10 configuration with 4 identical disks. Yes, I used smartmontools on them (short test run) and the result shows nothing untoward. This system is very new - just set up.

[g.random (gunnar-zarncke)]

I have added
GRUB_CMDLINE_LINUX_EXTRA="libata.dma=1"
to /etc/default/grub
and the problems hasn't reoccurred since then.

[Jeremy Foshee (jeremyfoshee)]

Hi g.random,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 530060

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu release http://www.ubuntu.com/getubuntu/download . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]