finding bad blocks in AdvFS on RAID-5?

From: Matt Harrington (matt@msg.ucsf.edu)
Date: Wed Sep 24 2003 - 14:39:21 EDT

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I have an AdvFS filesystem on an external RAID controller. One drive died,
and the rebuild failed because the RAID controller found a bad block on one
of the other disks. my 8 drives look like this:

1: spare
2: data
3: data, bad drive
4: data
5: data
6: data
7: data
8: data, bad block found during rebuild

the rebuild fails because of the bad blocks on drive 8. my vendor says i
need to identify the bad blocks on drive 8 using some kind of filesystem
utility. they're unfamiliar with Tru64 UNIX. another suggestion of theirs
is to find the file with the bad block and get rid of it, recreate the file,
or restore it from tape.

what AdvFS utilities can i use to find the bad blocks? how should i
proceed?

---Matt

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