2 Corrupted Disk Recovery Questions: After the fact

From: Greg Freemyer <freemyer_at_NorcrossGroup.com>
Date: Fri, 25 Jan 2002 15:48:22 -0500

Managers,

Yesterday, we had a major screw-up. A technician mistakenly pulled the power plug on a running production DS-10.

I think the bootstrap code and part of the root filesystem got damaged.

Note being sure what to do, I re-installed the OS from CD (Tru64 V5.0) and read in my backups. So life is Okay, but we were down for far too long.

If I would have known how to do it, I would have preferred to:

1) Boot from the OS CD and get a prompt.

2) Re-write the bootstrap loader.

3) Mount the root drive as /mnt

4) Restore my root backup.

I don't know how to do 2 or 4 .

2) I suspect can be done with disklabel, but I did not want to blow away the data already on the disk.

4) requires a /dev/tape/tape0 type device (the server has a internal DAT drive), I tried to create it with dskmgr -K, but it did not work.

Details on how to write a bootstrap and access a tape drive while booted from the OS CD would be appreciated.

Greg Freemyer
Internet Engineer
Deployment and Integration Specialist
The Norcross Group
www.NorcrossGroup.com
Received on Fri Jan 25 2002 - 20:52:11 NZDT

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