SCSI timeouts

[Dean Grover]

We have been having some SCSI timeouts on our systems, which leaves the
SCSI disks useless until a reboot of the system.  Here are the messages
which go to the log file:

vmunix: sd2:  sdtimer: I/O request timeout
vmunix:   last phase = 0x85 (Disconnect MSG)
vmunix:   csr=0x160f  bcr= 0 tcr= 0x4
vmunix:   cbsr= 0x0 (BUS FREE) cdr= 0x0  mr= 0x0 bsr=0x10

I have seen these types of messages on 2 types of systems, a Sun 3/260
running SunOs 4.0.3 and a Sun 4/260 running SunOs 4.0.3.  Any suggestions,
patches or bug ids will be appreciated.

Thanks,
Dean Grover
Hughes Aircraft Co.
grover at sed170.hac.com or adgrover at hac2arpa.hac.com