Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!biar!jhood
From: jhood@biar.UUCP (John Hood)
Newsgroups: comp.sys.amiga
Subject: Re: Omti Controller
Message-ID: <534@biar.UUCP>
Date: 4 May 89 22:21:30 GMT
References: <2385@van-bc.UUCP>
Reply-To: jhood@biar.UUCP (John Hood)
Organization: Biar Games Inc., Ithaca, NY
Lines: 27

In article <2385@van-bc.UUCP> lphillips@lpami.wimsey.bc.ca (Larry Phillips) writes:
>In <3759@sdsu.UUCP>, lindwall@sdsu.UUCP (John Lindwall) writes:
>>	Anyone have any info on these adaptors?  Which one is better? An
>>article in Amazing Computing says the Omti allows 1-1 interleave while the
>>Adaptec can only handle 3-1.  Is this true?
>
>I have heard it said that the OMTI is considerably faster than the Adaptec. If
>the statement about interleave in the Amazing Computing article was true, it's
>a beacon of light in a morass of falsehoods, and probably should be bronzed.

According to Adaptec's manual, it depends.  With the Adaptec 4000A,
you can format tracks to either 17 or 18 512-byte sectors (among other
possibilities).  If you format for 17 sectors, you get 1:1 interleave.
If you format for 18, you get 2:1.  These are under optimal
conditions; the Amiga probably fits into this category (I don't have
one, I'm just wandering through).

I wouldn't be surprised to find that the OMTI controller is faster--
the Adaptec was the first real SCSI controller, and one of the very
first controllers for ST-506 drives able to do 1:1 interleave.  It's
only just barely able to do it.

  --jh-- 
John Hood, Biar Games snail: 10 Spruce Lane, Ithaca NY 14850 BBS: 607 257 3423
domain: jhood@biar.uucp (we hope) bang: anywhere!uunet!biar!jhood
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