Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!ucsd!ucbvax!ELROND.SSEC.HONEYWELL.COM!thompson
From: thompson@ELROND.SSEC.HONEYWELL.COM (John Thompson)
Newsgroups: comp.sys.apollo
Subject: re: DN10000 disk space
Message-ID: <9012070501.AA27758@pan.ssec.honeywell.com>
Date: 7 Dec 90 05:01:54 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 34


> We are looking into buying a DN10000 but need lots of disk space.
> I understand that it comes with an ESDI controller from which I
> can attach up to 4 disks.  I've also been told that ESDI disks
> do not come larger than 700 MB.
> 
> Can someone confirm or deny this?  What do I do if I want more
> disk space than 4 * 700 MB.  Can I purchase another ESDI
> controller?

To the best of my knowledge, HP/Apollo (really, Apollo for this) 
only supports _2_ drives per controller.  You can put in 4 controllers
though, for 8 total drives.  At the current (700MB) disk sizes,
that gives 5.4GB (formatted available disk space) if you use all 8.
Note that you will need the external cabinet for this (internal takes
up to 4 drives).  Rumour has it that you can put (and HP/Apollo might
start to support) _6_ controllers in the VME bus, as long as you have
the IBM token-ring (Apollo ring and Ethernet use a VME slot, and you
have only 6 total).  With 5 controllers you'd get 6.7GB, and with
6 controllers (and the IBM ring - yuck!) you'd get 8.1GB.

In the future, we are supposed to be able to put in much larger
disks.  I've heard 18GB being bounced around as the upper limit come
late Q1 of 1991.  "Talk with your local Apollo System Engineer."


-- jt --
John Thompson (jt)
Honeywell, SSEC
Plymouth, MN  55441
thompson@pan.ssec.honeywell.com

As ever, my opinions do not necessarily agree with Honeywell's or reality's.
(Honeywell's do not necessarily agree with mine or reality's, either)