[156] in Info-AFS_Redistribution
Missing Backup Volumes
daemon@ATHENA.MIT.EDU (David Carrel)
Tue Jun 18 12:15:17 1991
From: David Carrel <carrel@antlia.ece.cmu.edu>
To: Info-AFS@transarc.com, Liz_Hines@transarc.com
Date: Tue, 18 Jun 91 11:45:52 EDT
I hate to contradict Liz's post, but we have been having this problem on the
order of one volume a day turning up missing. We can salvage (volumes or
partitions) till we are blue in the face to no avail.
The fix is to "vos remove" the backup volume. (Remember kids... don't
forget to add the ".backup" or you'll be sorry.) This reports that the
volume really doesn't exist on disk, but it goes ahead and deletes whatever
is lying around that was causing "vos backup" to fail. (Probably just a VLDB
entry. I haven't tried using "vos delentry" yet.)
The frustrating discovery in this is that "vos backup" returns successfully
and claims:
Created backup volume for user.foo
even though no backup volume was made. We never experienced this particular
failure mode until AFS 3.1. Different verisons of AFS have had their
peculiar failure modes so we at ECE do not use "vos backupsys". Rather we
have each server collect a list of it's volumes and run "vos backup" on each
one individually. By doing this, the program can analyze each individual
failure and take the appropriate action.
Dave Carrel
ECE Facilities
