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Date:      Fri, 02 Aug 2002 22:28:07 +0100
From:      Peter Risdon <PeterRisdon@netscape.net>
To:        freebsd-questions@FreeBSD.ORG
Subject:   scsi raid probs
Message-ID:  <3D4AF967.4020609@netscape.net>

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A FreeBSD 4.2 machine suffered damage in an electrical storm, either 
from repeated power outages (UPS not working) or from a power surge on 
ethernet or isdn connections. Didn't boot --> new motherboard => booted. 
Then scsi raid array didn't come up (3x30GB IBM disks in RAID V array 
using adaptec 2100S controller) --> new controller card => raid array 
came to life. But I can only transfer files of up to 25MB in size. If it 
doesn't like a transfer, machine hangs. If shut down without a hang, 
complains that 1 (or more) buffer did not respond and says it is "giving 
up" on it. Then shuts down but RAID array has not been marked clean.

New 4.6 system on IDE drive, and I have copied, painfully, some data 
from the array. But some files > 25MB and anyway, it will take all month 
to transfer in small lumps.

Can anyone suggest any way to mount the array such that it can deliver 
its data? Or a way to transfer that won't clog the system? I've been 
mounting it read-only and that seems to help. I can copy large numbers 
of files in small groups but trying to copy either too many files at 
once or too large a file on its own causes the whole system to freeze 
and I have to reboot.

All useful suggestions gratefully received.

Peter Risdon.


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