[linux-lvm] [DRBD-user] Re: Spontaneous access to the CDROM on two computers simultaneously

[Maurice Volaski]

It happened again, but this time on just one of the two computers:

[20770.844282] hda: tray open
[20770.844288] end_request: I/O error, dev hda, sector 0
[20770.844292] Buffer I/O error on device hda, logical block 0

Since you think LVM may be misbehaving, I changed the filter on the
affected computer to read

filter = [ "r|/dev/cdrom|", "r|/dev/hda|", "r|/dev/ide|" ]

Ironically, that's on the computer that threw the error, so it could
be more evidence LVM has a problem if it is indeed the cause or
further evidence that it isn't involved.

The kernel on this amd64-based computer is now 2.6.16.20. LVM is
version 2.02.05 (versions from Gentoo packages). Device mapper is
1.02.07 and udev is 090.) Since I'm shooting in the dark, cc'd to the
gentoo ml since this system is gentoo-based (2005.0 profile).

/ 2006-06-12 01:06:30 -0400

Spontaneously and for no apparent reason, two computers displayed
[55419.446442] Buffer I/O error on device hda, logical block 0
[55419.447381] hda: command error: status=0x51 { DriveReady

SeekComplete Error }

[55419.447386] hda: command error: error=0x54 { AbortedCommand
LastFailedSense=0x05 }
[55419.447389] ide: failed opcode was: unknown
[55419.447391] end_request: I/O error, dev hda, sector 0

...

drbd could at least theoretically triggered this somehow.

no.
much more likely some program scanning ("discovering") devices.
man lvm.conf
/filter

[Maurice Volaski]

It happened again, but this time on just one of the two computers:

[20770.844282] hda: tray open
[20770.844288] end_request: I/O error, dev hda, sector 0
[20770.844292] Buffer I/O error on device hda, logical block 0

Since you think LVM may be misbehaving, I changed the filter on the
affected computer to read

filter = [ "r|/dev/cdrom|", "r|/dev/hda|", "r|/dev/ide|" ]

Ironically, that's on the computer that threw the error, so it could
be more evidence LVM has a problem if it is indeed the cause or
further evidence that it isn't involved.

The kernel on this amd64-based computer is now 2.6.16.20. LVM is
version 2.02.05 (versions from Gentoo packages). Device mapper is
1.02.07 and udev is 090.) Since I'm shooting in the dark, cc'd to the
gentoo ml since this system is gentoo-based (2005.0 profile).

/ 2006-06-12 01:06:30 -0400

Spontaneously and for no apparent reason, two computers displayed
[55419.446442] Buffer I/O error on device hda, logical block 0
[55419.447381] hda: command error: status=0x51 { DriveReady

SeekComplete Error }

[55419.447386] hda: command error: error=0x54 { AbortedCommand
LastFailedSense=0x05 }
[55419.447389] ide: failed opcode was: unknown
[55419.447391] end_request: I/O error, dev hda, sector 0

...

drbd could at least theoretically triggered this somehow.

no.
much more likely some program scanning ("discovering") devices.
man lvm.conf
/filter