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From: thompson@PAN.SSEC.HONEYWELL.COM (John Thompson)
Newsgroups: comp.sys.apollo
Subject: re: Attaching a SCSI disk
Message-ID: <9103262127.AA25228@pan.ssec.honeywell.com>
Date: 26 Mar 91 21:27:09 GMT
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> What does one do after physically adding a SCSI
> disk to a 4500 to incorporate it into the filesytem?
> Presumably, there must be a device for it in /dev,
> so I guess an /etc/mkdsk will have to be done.
> Can I then use invol to add it as a logical volume?
> Any help, advice, comments, etc., welcome.
One physically removes it from the DN4500, and puts it onto a DN2500 or onto
a 9000/400t (or 425t, 400s, 425s, 433s).

Sorry for the half-attempt at wit (a half-wit?).  Unless HP/Apollo has changed
something _very_ recently, the only disks supported on the 'DN' nodes (except
for the 2500) are ESDI drives.  Specifically, the DN3000 and any DN3500/DN4000/
DN4500 with the old-style controllers can take up to a 325MB disk (I believe 
the Maxtor XT-4380E).  The DN3500/DN4000(?)/DN4500 can take the Western Digital
WD7000 controller, which can control up to two 170MB, 325MB, or 697MB disks
(of the same type).  I don't remember the 170MB, but the 325MB is the Maxtor
disk (see above), and the 697MB is the Maxtor XT-8760E disk.  The DN10000 can
handle at least two disks per controller, and can have up to four controllers.
These are Interphase 4301 VMEbus controllers with some added PROMs.  The DN10k
takes either the 325 or 697MB disks.  (I say 'at least two disks per controller'
because SALVOL, INVOL, and CONFIG imply that you can stick on four disks, but
Apollo reps tell me that you can only put on two.  I have only verified that the
DN10k can handle 8 disks (5.5 GB, set up as 4 volumes of 2 striped disks each).

It seems that many people get confused/misled about the SCSI interface.  
HP/Apollo is not providing complete/total/transparent support to this interface
except on the new boxes (and even then they won't promise it).

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

Me?  Represent Honeywell?  You've GOT to be kidding!!!