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From: space@nadia.UUCP (Lars Soltau)
Newsgroups: comp.sys.amiga
Subject: Re: A2090a
Summary: half true...
Message-ID: <367@nadia.UUCP>
Date: 26 Apr 89 00:31:48 GMT
References: <20746@srcsip.UUCP> <6660@cbmvax.UUCP>
Reply-To: space@nadia.UUCP (Lars Soltau)
Organization: Stuttgart Net System, FRG
Lines: 23

In article <6660@cbmvax.UUCP> jesup@cbmvax.UUCP (Randell Jesup) writes:
>In article <20746@srcsip.UUCP> carpent@coltrane.SRC.Honeywell.COM (Todd Carpenter) writes:
>>1) Someone stated that low-level interleave on the A2090a is not user
>>   selectable.  (it is an artifact in the mountlist) Is this correct?  What is
>>   it set at?
>
>	I believe it is always set to 1.  I'd be suprised if it was otherwise
>(though it is possible).  The 2090 can handle interleave 1, it seems some
>drives can't.

Half true. Interleave IS always set to one at prep time (we're talking SCSI
drives here, with ST506 the A2090(a) doesn't do a lowlevel format).

But the A2090(a) cannot handle interleave 1 with all drives. The
Seagate ST296N for example has 34 sectors per track. Too much for my poor
old A2090. With interleave 1 data transfer slows down to a meager 170KB/s.

But after one day of debugging and single-stepping I was able to prep my
hd with interleave 3. Now it makes 390KB/s. Not that much, either, but 
interleave 2 is still too fast for the A2090. Oh well, I'm selling that
drive anyway (thnx Bill :-).
-- 
Lars Soltau	UUCP: ...uunet!unido!pfm!nadia!space	BIX: -- no bucks --