BIO and dm-linear messages in WARN

[lcurrie]

I have a OES1 SP2 Linux server which is generating the following errors.
Any ideas? What is going on? This server is part of a cluster Thanks, Lin

server kernel: BIO_UPTODATE not set. Got an IO error
Oct 19 15:40:15 server kernel: BIO_EOF set. Got an IO error
Oct 19 15:40:15 server kernel: BIO_UPTODATE not set. Got an IO error
Oct 19 15:40:15 server kernel: BIO_EOF set. Got an IO error
Oct 19 15:40:15 server kernel: BIO_UPTODATE not set. Got an IO error
Oct 19 15:40:15 server kernel: BIO_EOF set. Got an IO error
Oct 19 15:40:15 server kernel: NSSLOG ==> [Error] /usr/src/packages/BUILD/kernel-bigsmp-2.6.5/modules-2.6.5/nss/zlss/zfsSuperBlk.c[1139]
Oct 19 15:40:15 server kernel: Oct 19, 2009 3:40:15 pm NSS<ZLSS>-4.09a-1457:
Oct 19 15:40:15 server kernel: Unable to correct super block header 4 (19660289) (Error: 4294967295). Run Verify.
Oct 19 15:40:15 server kernel:
Oct 19 15:40:20 server kernel: device-mapper: dm-linear: Device lookup failed
Oct 19 15:40:20 server kernel: device-mapper: error adding target to table
Oct 19 15:40:20 server kernel: device-mapper: dm-linear: Device lookup failed
Oct 19 15:40:20 server kernel: device-mapper: error adding target to table
Oct 19 15:40:20 server kernel: device-mapper: dm-linear: Device lookup failed
Oct 19 15:40:20 server kernel: device-mapper: error adding target to table