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- From: ralf+@cs.cmu.edu (Ralf Brown)
- Newsgroups: comp.os.msdos.programmer,comp.os.msdos.misc
- Subject: Re: Disk Drive Purchase?
- Message-ID: <Bu34nA.3FB.2@cs.cmu.edu>
- Date: 5 Sep 92 03:06:45 GMT
- Article-I.D.: cs.Bu34nA.3FB.2
- References: <1992Aug26.183636.12146@jts.com> <1992Aug28.144538.1@ttd.teradyne.com> <1992Sep2.220649.11769@newstand.syr.edu>
- Sender: news@cs.cmu.edu (Usenet News System)
- Organization: School of Computer Science, Carnegie Mellon
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- In article <1992Sep2.220649.11769@newstand.syr.edu> amichiel@rodan.acs.syr.edu (Allen J Michielsen) writes:
- }3. IDE drives and controllers, could already be windows 32 bit disk access
- } compatible.
-
- They probably are, since they emulate the WD-1003 controller that the Windows
- 32-bit disk code was written for. I'm not sure I'd want to be the first
- person to try it, though.
-
- } IDE drives and controllers are about as fast as they are
- } ever going to be, or are capable of being. However, they do have plenty
- } of throughput, and i/o headroom for faster systems, today. They will
- } start showing age, as systems keep doubling in speed, and larger and
- } larger software becomes available. On the other side, the tremendous
- } cost of ESDI drives and controllers will be a serious drawback to the
- } wide acceptance of these systems.
-
- Yeah, ESDI drives are currently more expensive than the same-sized IDE
- drives even if you ignore the cost of the controller.... IDE won't max
- out for a while yet if the drives themselves keep getting faster--I've seen
- cached 32-bit (ESDI and local-bus) IDE controllers. It'll take a few years
- until drives can keep up with a 100+ MB/s local-bus controller :-).
-
- The more immediate limit to IDE (and ESDI) is likely to be the size of the
- drive. If (as I suspect), the WD-1003 only permits 16 heads, then the
- limit on IDE is 504 MB (1024 cylinders * 16 heads * 63 sectors/track); even
- if a full 64 heads are available, the limit is less than 2GB--a size which
- is already readily available even if not yet cheap ($3000+) in SCSI
- versions.
-
- --
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