I have an Xtore XJ-SA12-316R external SAS chassis housing 12 Seagate ST375064
disks.
After an abortive attempt to get this setup using an Adaptec 58300 SAS
controller card and their proprietary adp94xx driver I bought an LSI Logic
SAS3800X card.
This is supported by module mptsas in RHEL4U4 kernel. As far as I can tell the
fusion mpt driver is GPL and so I might not get told off for asking questions
about it here? ;-)
I am slaving the disks together using md as raid5 (or raid6 array). Basically
it works 99.999% but occasionally produces error during md re-sync:
kernel: mptbase: ioc0: LogInfo(0x31120400): Originator={PL}, Code={Abort},
SubCode(0x0400)
Most times things appear to proceed as normal but a few times it is followed
by SCSI errors and the disk is dropped:
Oct 16 16:29:40 spt2 kernel: SCSI error : <2 0 9 0> return code = 0x10000
Oct 16 16:29:40 spt2 kernel: end_request: I/O error, dev sdd, sector 948164346
Oct 16 16:29:40 spt2 kernel: raid6: Disk failure on sdd1, disabling device.
Operation continuing on 10 devices
I can't prove that the disks aren't really producing timeouts/errors. But I've
seen several of them appear to do so and suspect it's the controller/driver. A
complication is the chassis which has built in SAS port expander which might
also be a factor.
Does anyone have any similar experience?
Thanks for any help.
Clem
More details:
Card is in Tyan dual AMD64 box. Kernel is RHEL4U4 2.6.9-42.0.2.ELsmp.
--
**********************************************************************
Clem Pryke - Assistant Professor - Astronomy and Astrophysics
University of Chicago,
Room 120, LASR, 933 East 56th Street, Chicago, Illinois 60637, USA
Tel: 773 702-7853 Fax: 773 702-6645 email: pryke@xxxxxxxxxxxxxxxxxx
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