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From: timothym@tekigm2.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Fast Hard Disks
Message-ID: <1832@tekigm2.TEK.COM>
Date: Wed, 3-Jun-87 12:01:26 EDT
Article-I.D.: tekigm2.1832
Posted: Wed Jun  3 12:01:26 1987
Date-Received: Sat, 6-Jun-87 06:13:15 EDT
References: <2157@husc6.UUCP>
Reply-To: timothym@tekigm2.UUCP (Timothy D Margeson)
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 26
Keywords: Disks

Hello netlanders...

Again the subject of hard disks comes up. 

A fast access time does not equate to a fast performance, always that is.

Be sure to look at other factors, like the CPU to Disk interface. If you are
looking for the ultimate in performance on an IBM PC or Clone, look for a
SCSI interface and a SCSI drive. And when looking at the controller, be sure
it will do full cylinder buffering and allow you a 1:1 interleave.

There are drive controller combinations out there that have data transfer 
rates in excess of 500kbytes per second (a good ST412 system approaches 250
kbytes per second, with full track buffering about 350kbytes per second). It
is conceivable that a good SCSI controller and drive will push bytes back and
forth to your CPU at rates up to 1 megabyte per second, limited to the PC's
DMA bandwidth and the disk rotational speed.

Good luck...


-- 
Tim Margeson (206)253-5240
PO Box 3500  d/s C1-937                          @@   'Who said that?'  
Vancouver, WA. 98668
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