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From: grr@cbmvax.UUCP (George Robbins)
Newsgroups: comp.sys.amiga
Subject: Re: A2090 Notes
Message-ID: <2872@cbmvax.UUCP>
Date: Sat, 28-Nov-87 21:09:55 EST
Article-I.D.: cbmvax.2872
Posted: Sat Nov 28 21:09:55 1987
Date-Received: Tue, 1-Dec-87 02:47:38 EST
References: <2870@cbmvax.UUCP> <1941@marque.mu.edu>
Reply-To: grr@cbmvax.UUCP (George Robbins)
Organization: Commodore Technology, West Chester, PA
Lines: 24
Keywords: amiga A2090 disk controller

In article <1941@marque.mu.edu> joeb@marque.UUCP (Joe Bronikowski) writes:
> In article <2870@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes:
> >2) ST506/ST412 drives are fairly generic these days.  The one restriction
> >   to keep in mind is that the A2090 does not support relatively exotic
> >   drives having more than 8 heads.   Check drive specifications to avoid
> >   embarrassment in this regard.
> 
> What about drives that allow RLL encoding?  For example, the Seagate ST277R
> has the same specs as the ST251 which you mentioned as working, except that
> it uses RLL encoding to provide 76.9 MB (unformatted) instead of 51.2 MB (and
> the price is only 10% greater!).  Since you need a special RLL controller card
> when you use this drive in a PC, does that mean that the A2090 will see it as
> only a 51.2 MB disk (or worse)?  Should I buy the ST251 instead?

Right, RLL doesn't get you scratch without an RLL controller.  I'm not sure
what will happen with this particular drive, but either you only get the 50MB
or it won't work due to some incompatibility.  Might as well buy to ST251 or
get a SCSI version that hides the RLL or other tricks behind a wall of higher
level protocol.

-- 
George Robbins - now working for,	uucp: {uunet|ihnp4|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr@uunet.uu.net
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)