Path: utzoo!utgpu!water!watmath!clyde!att!rutgers!mailrus!cornell!rochester!bbn!clsib21!peter
From: peter@clsib21.UUCP (Peter Craine)
Newsgroups: comp.sys.sequent
Subject: Re: Third Party Disc Experience on Sequent systems
Summary: Oh boy, have we added disks
Message-ID: <919@clsib21.UUCP>
Date: 3 Oct 88 18:01:13 GMT
References: <1049@orion.cf.uci.edu>
Distribution: na
Organization: CLSI  Newtonville, Mass
Lines: 41

In article <1049@orion.cf.uci.edu>, roode@orion.cf.uci.edu (Dana Roode) writes:
> We need to add some additional disc to our Sequent Symmetry system,
> and are wondering if it makes sense to look into third party
> disc.  Does anyone at other Sequent sites have specific experience
> in using non-Sequent disc?
> 
>      Dana Roode
>      UC Irvine Computing Facility
> 
> -- 
> Dana Roode

We at CLSI (a Sequent OEM) have added several of the CDC disks:

		9715 - 340 MB (FSD)
		9771 - 800 MB (XMD)
		9720 - 368 MB and 850 MB (EMD)

We will soon be working on the 9720 series 1.2 Gig drive.

These drives work very well on the DCC (firmware version 12 or later).

BUT!!!!  The DCC is a VERY intelligent controller.  So intelligent, you have
to be intimately familiar with it and the drive to get the timing right.

We had to take a three-day course from Sequent to figure this whole thing
out.  Let's just say that adding drives is a non-trivial project.

Of course, theoretically, you could add any SMD-interface drive to the DCC
if you had enough information.

Sequent supports many of the Fujitsu drives.  These drives are (among) the
best on the market (in terms of reliability).  [forgive the editorializing
here; I've been a fan of Fuji for some time].

I hope these idle wanderings of the mind help.  If I can help you with
specific questions, send me some mail.

			Peter Craine
			 ..!harvard!bbn!clsib21!peter
			   [bah! who needs a .signature]