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From: JMS@MRSVAX.MIS.ARIZONA.EDU (Profitability is the sovereign of the enterprise, Drucker)
Newsgroups: comp.os.vms
Subject: RE: Any experience of mixing RA81's and RS82's on the same
Message-ID: <870920202957.20600C7D063@mrsvax.mis.arizona.edu>
Date: Sun, 20-Sep-87 23:29:57 EDT
Article-I.D.: mrsvax.870920202957.20600C7D063
Posted: Sun Sep 20 23:29:57 1987
Date-Received: Tue, 22-Sep-87 00:48:14 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
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John_Macallister writes:
     
>We're installing an HSC50 and have a mixture of RA81/RA82 disks. To
> balance the load it would be necessary to mix RA81's and RA82's on
> the same controller. Any known problems with this given that the
> disks have slightly different access times?

At the University Computation Center, they have 16 RA drives: 12
RA81s and 4 RA82s.  Other than being incredibly pleased with
the performance speedup, the ability to shadow-set large volumes,
and having another couple of gigs of storage, they have had no
problems.  Tonight, the drives are evenly spread across two HSC50s
(8 and 8).

jms

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