sense key error?

dave (tel1dvw@is.ups.com)
Sun, 2 Mar 1997 04:57:09 -0500 (EST)

Hi all. During excessive disk activity, I received the following error
from 1.2.26, libc 5.2.18. I was having some real problems with my 2940
and later libc versions. (at least I think that was it..) The kernel
reported these errors, hence linux-kernel, but aren't they just scsi
driver problems?

These are the errors reported to the screen and syslog: (from various
parts of messages; may not all be related)

Mar 2 04:21:27 discserv kernel: SCSI CD error : host 0 id 6 lun 0 return
code = 28000002
Mar 2 04:21:28 discserv kernel: extra data not valid Current error
sr0b:00: sense key Hardware Error
Mar 2 04:21:28 discserv kernel: Additional sense indicates Track
following error
Mar 2 04:21:28 discserv kernel: CD-ROM I/O error: dev 0b:00, sector 112
Mar 2 04:22:01 discserv kernel: scsi : aborting command due to timeout :
pid 425870, scsi0, channel 0, id 6, lun 0 Read (6) 00 01 44 01 00
Mar 2 04:22:01 discserv kernel: aic7xxx: (abort) Aborting scb 2, TCL
6/0/0
Mar 2 04:22:01 discserv kernel: scsi0: MEDIUM ERROR on channel 0, id 6,
lun 0,CDB: Read (6) 00 01 44 01 00
Mar 2 04:22:01 discserv kernel: Current error sr0b:00: sense key Medium
Error
Mar 2 04:22:01 discserv kernel: Additional sense indicates No seek
complete
Mar 2 04:22:01 discserv kernel: CD-ROM I/O error: dev 0b:00, sector 1296
Mar 2 04:22:29 discserv kernel: scsi0: MEDIUM ERROR on channel 0, id 6,
lun 0,
CDB: Read (6) 00 01 44 01 00
Mar 2 04:22:29 discserv kernel: Current error sr0b:00: sense key Medium
Error
Mar 2 04:22:29 discserv kernel: Additional sense indicates No seek
complete
Mar 2 04:22:29 discserv kernel: CD-ROM I/O error: dev 0b:00, sector 1296
Mar 2 04:22:32 discserv kernel: scsi : aborting command due to timeout :
pid 428927, scsi0, channel 0, id 6, lun 0 Read (6) 00 00 1d 01 00
Mar 2 04:22:32 discserv kernel: aic7xxx: (abort) Aborting scb 4, TCL
6/0/0
Mar 2 04:22:49 discserv kernel: SCSI CD error : host 0 id 6 lun 0 return
code = 28000002
Mar 2 04:22:49 discserv kernel: extra data not valid Current error
sr0b:00: sense key Hardware Error
Mar 2 04:22:49 discserv kernel: Additional sense indicates Track
following error
Mar 2 04:22:49 discserv kernel: CD-ROM I/O error: dev 0b:00, sector 116
Mar 2 04:23:16 discserv kernel: SCSI CD error : host 0 id 6 lun 0 return
code = 28000002
Mar 2 04:23:16 discserv kernel: extra data not valid Current error
sr0b:00: sense key Hardware Error
Mar 2 04:23:16 discserv kernel: Additional sense indicates Track
following err

[...]

I was having a problem with motherboard, so I replaced it with a new one.
To make sure it was in fact the motherboard, I ran a shell script that
copies data excessivly in an attempt to produces the scsi and ide timeouts
I was getting. It ran for more than an hour with average of 17 load
average, and no problems.

I have two 2.1 gig scsi disks connected internally to a 2940, bios 1.16
(no autoterm) and externally is a Pioneer DRM-604x and a jaz drive.

I'm pretty sure about termination, etc, and the fact that the disks are
just fine.

Also, like I said, the cp's ran for more than an hour, so I know its not a
bad cdrom, or even part of it.

ps. What is an SCB?

Any ideas?
Thanks,
Dave Wreski