This is one of those instances where terminology gets screwed up. "mirrorng"
versus
having an "official backup" of data.  Granted "breaking the mirror" has been
known
to work as a backup.

In terms of Disk STGPOOLS...

-- For the love of God, use JFS.  For ALL DB, LOG, DATA vols.
   At the very least its a safety measure, won't go into details.
   At the very least its a safety measure, won't go into details.
   Don't question the word on this one, just do it.  Forget you ever
    heard the word RAW LV.  RAWLV w/ADSM is just asking for trouble.

-- SSA, don't try anything fancy.  Don't expect peak performance when using
   with ADSM.  Yeah, everyone drops a horde of money into these arrays
   with ADSM.  Yeah, everyone drops a horde of money into these arrays
   and get mediocre results.  Its a known thing..hint..hint..

-- When using AIX mirroring, don't expect big boosts in performance.  If
this
this
   turns into a key selling point, find other things to do with your time.


ADSML