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From: jeff@eniac.seas.upenn.edu (Jeffrey M White)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Quantum 105 drives (again)
Keywords: How fast?
Message-ID: <16962@netnews.upenn.edu>
Date: 15 Nov 89 15:05:47 GMT
References: <4050@ur-cc.UUCP>
Sender: news@netnews.upenn.edu
Reply-To: jeff@eniac.seas.upenn.edu.UUCP (Jeffrey M White)
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Organization: University of Pennsylvania
Lines: 16

In article <4050@ur-cc.UUCP> carlo@cvs.rochester.edu (Carlo Tiana) writes:
>There seems to be some confusion (at least in my mind and that of a few
>others I spoke to) about the Quantum 105Mb drives' speed. Is it 19ms access
>or 12ms? The MacLand ad in the Dec 89 issue of MacUser says 19ms, while
>MacWeek's M.O. section has an ad by MacTel Technology Corp. listing them at
>12ms. I have seen both figures in other places also, but have no
>references. Does anyone know what the story is?

  Quantum drives have a 'real' access time of 19ms.  However, most of
them have a 64k cache chip built into them, which I guess in the standard
seek test reduces this time to 12ms (often quoted as 'effective' access time).


						Jeff White
						University of Pennsylvania
						jeff@eniac.seas.upenn.edu