Hi List,

We have a spot of bother. We're running a fully up to date RHEL5.1 on a Sun
x4600 M2 server with Emulex LightPulse fibre channel cards to connect to a
Sun StorageTek 2540 disk array. This uses the lpfc driver. We've had an
awful lot of trouble getting it to work consistently.

When encountering an issue we've had kernel panics when trying to remove the
driver and a lot of hassle getting things working generally

Last night this happened:

Jan 8 04:08:16 bedford kernel: sd 3:0:0:0: SCSI error: return code = 0x06000000
Jan 8 04:08:16 bedford kernel: end_request: I/O error, dev sdc, sector 31031
Jan 8 04:08:16 bedford kernel: Buffer I/O error on device sdc1, logical block 3873
Jan 8 04:08:16 bedford kernel: lost page write due to I/O error on sdc1
Jan 8 04:08:50 bedford kernel: Buffer I/O error on device sdc1, logical block 1027
Jan 8 04:08:50 bedford kernel: lost page write due to I/O error on sdc1
Jan 8 04:05:11 bedford kernel: lpfc 0000:04:00.0: 0:0338 IOCB wait timeout error - no wake response Data x3c
Jan 8 04:07:13 bedford kernel: lpfc 0000:04:00.0: 0:0338 IOCB wait timeout error - no wake response Data x3c
Jan 8 04:08:16 bedford kernel: sd 3:0:0:0: scsi: Device offlined - not ready after error recovery
Jan 8 04:08:16 bedford kernel: sd 3:0:0:0: SCSI error: return code = 0x06000000
Jan 8 04:08:16 bedford kernel: end_request: I/O error, dev sdc, sector 31031
Jan 8 04:08:16 bedford kernel: Buffer I/O error on device sdc1, logical block 3873
Jan 8 04:08:16 bedford kernel: lost page write due to I/O error on sdc1
Jan 8 04:08:50 bedford kernel: Buffer I/O error on device sdc1, logical block 1027
Jan 8 04:08:50 bedford kernel: lost page write due to I/O error on sdc1

The array became read only and then eventually the OS denied it was a valid
block device. Again, when we tried to remove the driver module the machine
kernel panicked. We're pretty sure this is something to do with a bug in
the kernel below 2.6.23 which causes disks to vanish, etc. Although the
only reference we can find is in the Fedora stream. Has anyone had any
similar issues?

Ben
--
Unix Support, MISD, University of Cambridge, England
Plugger of wire, typer of keyboard, imparter of Clue
     Life Is Short.       It's All Good.

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