random panics on AXP 3000/400 after upgrade

From: V.S. Glukhov <glukhov_at_sequence.Stanford.EDU>
Date: Sun, 19 Jul 1998 10:11:47 -0700 (PDT)

Dear managers,

I recently upgraded two old machines (3000/300 and 3000/400)
to v.5 firmware and DU4.0D, no patches. Previously they were running 3.2c,
firmware v. unknown, and used to have uptimes > 150-200 days, limited
only by scheduled maintenance downtimes.

Immediately after the upgrade both machines started having problems with
disks, namely with the disks that had a swap partition on them. Both machines
now show lots of CAM errors in binlog and panic occasionally. CAM errors
are related to one particular disk on each machine. For the 3000/300 it's the
disk with the primary swap, for the 3000/400 it's the disk with the secondary
swap. Coincidence? Both disks failed after the upgrade? I can't believe it.

The question is:

Is there something in FW v.5 and DU4.0D that makes the machines
overly (more) sensitive to SCSI/disk problems such as cable length, cable
quality, slow devices (tapes) on the same controller?


Thanks.

VSG.
Received on Sun Jul 19 1998 - 19:12:50 NZST

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