Mirroring has saved us on a number of occasions.  I strongly recommend it.
If you get a disk error, your ADSM server can continue running without
interruption.  You should also mirror your log volumes.  Mirrored copies
should be on different DASD/disk, and if possible on different channels.
Re-sync is automatic, after you vary the second db vol back online.  Messages
are written to the activity log when a disk fails, so if you look there you
will see the message.
..Paul
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On Tue, 17 Oct 1995 15:42:44 CDT asdf said:
On Tue, 17 Oct 1995 15:42:44 CDT asdf said:
>We are looking into mirroring our ADSM database. Can anyone tell me
>what this will gain us? How does it help you recover from a database
>error? Does the database automatically get synchronized with the
>mirror after you correct the problems with the database volume?
>Does it notify you that there was a problem that needs to addressed?
>
>What does mirroring gain us for the cost of the DASD? Are there any
>additional down sides to mirroring besides requiring twice the disk
>space?