SCSI bus speed downshifted

[Mipam]

Hi,

When i went to take a look at a server i found
in one scsi disk a red light burning, bad news, checking the logs:

ciss0: *** SCSI bus speed downshifted, SCSI port 2
ciss0: *** SCSI bus speed downshifted, SCSI port 2
ciss0: *** Physical drive failure: SCSI port 2 ID 1
ciss0: *** State change, logical drive 0
ciss0: logical drive 0 (pass0) changed status OK->interim recovery, spare
status 0x0

Happily the raid controller was configured as raid 1, so the system
kept running. I pulled the defect disk out and ordered a new one, in the
mean time the system keeps running fine.
But is there a command which i can issue to check the status of ciss0 and
the drives? Would camcontrol help? But i wont just touch that command as
experiment because i may screw up things by doing so.
Any suggestions?
Bye,

Mipam.