Filing system corruption

• To: alpha-osf-managers@xxxxxxxx
• Subject: Filing system corruption
• From: Martyn Johnson <Martyn.Johnson@xxxxxxxxxxxx>
• Date: Wed, 03 Aug 1994 09:15:01 +0100
• cc: Martyn.Johnson@xxxxxxxxxxxx

I've recently been suffering from a series of minor filing system
corruptions. The machine is a 3000/500S running OSF/1 V1.3.  The disc
concerned is an RZ26 (one of many) and is exported over NFS to a wide
variety of client machines (multiple vendors).

What seems to be happening is that I get directory entries pointing to
unallocated inodes. Sooner or later the inode gets reallocated to
something else, thus leaving me with either an extraneous hard link to
a directory, or a regular file with wrong link count. If I unmount the
disc and fsck, it says it is "clean", but if I force it to fsck with
the -o option, it finds the errors and corrects them.

Only one filing system is affected. The other partition on the same
physical disc is fine.  There are no disc errors reported in the error
log.

I suspect that the effect is being provoked by something that one of
the users who lives on this partition is doing, but I have no idea
what. The users actually affected by the problem do not seem to be
doing anything unusual.

Does anybody recognise these symptoms?

Martyn Johnson      maj@xxxxxxxxxxxx
University of Cambridge Computer Lab
Cambridge UK

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