In most failover environments, the access from the outside of the clustered
systems is via an IP alias.  Can you configure Amanda to backup the shared
storage via the clustered system's IP alias.  If you don't have such an
alias, then set up an alias to be active on the system that is controlling
the shared storage (change your failover scripts to have the machine that
currently owns the storage to assert the IP alias and the machine
relinquishing the storage must remove its alias) and have backups directed
to that alias.

If your configuration looks something like:
        hosta   1.2.3.4
        hostb   1.2.3.5
        cluster 1.2.3.6

Your shared storage is:
        /shared_data

Your DLE would look like:

        cluster /shared_data    normal

See if that works for you.  It is pretty much what I have done in the past
with HP/Compaq Tru64 UNIX, which provides that sort of clustering as an
add-on service to their flavor of UNIX.  Another advantage is that there is
a consistent view through the indexes that doesn't care which machine
controlled the storage at the time of the backup.

Don
Donald L. (Don) Ritchey
E-mail:  Donald.Ritchey AT exeloncorp DOT com


-----Original Message-----
From: Paolo Supino [mailto:paolo AT telmap DOT com]
Sent: Monday, May 19, 2003 8:13 AM
To: 'amanda-users AT amanda DOT org'
Subject: failover environment



Hi 

  I have 1 environment where a certain path (nfs mounted, that needs
to be backed up) switches between 2 machines. Because this certain
mount is only active on 1 machine at a time amanda complains that it
can't find the path on the non active machine. Is there a way to make
amanda check and backup only the specific path only on the machine
that is active and that the path is actually mounted? 










        Paolo 



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