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From: whm@arizona.edu (Bill Mitchell)
Newsgroups: comp.unix.wizards
Subject: bad bitmaps that fsck can't seem to fix (4.3+NFS from Mt. Xinu)
Message-ID: <1825@megaron.arizona.edu>
Date: Wed, 22-Jul-87 20:34:23 EDT
Article-I.D.: megaron.1825
Posted: Wed Jul 22 20:34:23 1987
Date-Received: Sat, 25-Jul-87 02:14:53 EDT
Organization: U of Arizona CS Dept, Tucson
Lines: 16

One of our 785s running 4.3+NFS has a couple of filesystems that when checked,
produce the message "BLK(S) MISSING IN BIT MAPS". fsck claims to "salvage"
the bit maps, but a subsequent run of fsck produces the same diagnostic.

Running icheck on these filesystems produces several messages of the form:

 dup frag; inode=0, class=free frag

Anybody encountered this problem before?  Know how to fix it?

BTW-The disks in question are RA81s on a UDA-50; we're running the stock
4.3+NFS uda driver.

					Bill Mitchell
					whm@arizona.edu
					{allegra,cmcl2,ihnp4,noao}!arizona!whm