From: Mike Hudson (mjhudson@uwaterloo.ca)
Date: Tue Feb 25 2003 - 12:58:43 EST
Hello managers
Due to a series of power failures (while I was out of town) I am now
having prolems with my DS20E running 4.0E.
I have a third-party RAID which appears to the DS20E as a single large
disk connected via a SCSI. The RAID has several partitions which use
AdvFS. Externally the RAID seems fine - all lights are green and there
are no error message son its LCD console.
I can boot the DS20E to single-user mode fine (the system disks are
on local disks). The system sees the RAID device when I boot up, and
/sbin/advfs/advscan of the device detects the partitions there.
When I try to access the RAID using /sbin/advfs/verify or mount
the system crashes with
"trap: invalid memory read access ...
kernel panic"
(more messages with hex numbers of the fault flash by but they are only on
the console and do not seem to be logged anywhere).
and then reboots to single-user mode.
I have tried switching the RAID to a different SCSI controller but the
problem persists ...
I have tried reboting with a generic kernel ... no luck there.
Any ideas for at least starting points about how to diagnose this problem?
I don't know if the data on disk is corrupt or if there is a problem on
the system reading it ... I don't have a lot of experience managing this
sytem (I am not a full-time system manager, but rather a professor!).
Thanks in advance
Mike
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