EMC Symmetrix arrays use FW-SCSI connections to the HP3000, and are
configured using either the DARRAY device ID, if you're running MPE/iX
5.0 PP6 (minimum) or the SYMMETRIX ID if you're running 5.5 PP1 or
better.  Performance gains for us were significant - particularly for
batch processes.  Disk service times average 10-20 ms compared to 25-60
ms for our Cascade disk arrays (C225xHA).  We still run a mixed DASD
environment, but we will eventually migrate most, if not all, of our
volume sets to Symmetrix disk.

Lee Gunter          [log in to unmask]
Regence HMO Oregon


______________________________ Reply Separator _________________________________
Subject: [HP3000-L] EMC drives
Author:  [log in to unmask] at ~INTERNET
Date:    6/5/97 1:50 PM


     I am considering looking into purchasing some EMC disk drives.  I
     believe these are the ones with cache built in.  I have also
     heard that they significantly increase system performance.  If
     anyone can give me any feed back it would be very much
     appreciated.  I am especially wondering about the interface to
     the HP box.  Is it a separate card? Can one use a FW SCSI
     interface?

     TIA,

  ---------------------------------------------------------------
  Barry Durand      "The opinions expressed in this
  Systems Engineer II    email are not necessarily the
  Gulf South Health Plans    opinions of my employer"
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