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From: phil@brahms.amd.com (Phil Ngai)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: Weird disk problem. Help!!!
Message-ID: <1991Feb25.173229.5221@amd.com>
Date: 25 Feb 91 17:32:29 GMT
References: <-~`&%Z+@rpi.edu> <1651@ariadne.csi.forth.GR> <7Z`&Y+@rpi.edu> <1991Feb23.183432.20625@amd.com>
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ching@brahms.amd.com (Mike Ching) writes:
>One of the advantages of embedded controllers like SCSI and IDE is that
>the electronics can be tailored to the characteristics of the drive and
>common encodings don't have to be used. The transfer rate of small Conner
>drives indicate that they're RLL or ARLL. The large drives have caches
>which mask the transfer rates but it's reasonable to assume that they
>also use sophisticated encoding schemes.

Another advantage is that they can use Zone Bit Recording, where the
transfer rate depends on which cylinder you're on, and the "geometry"
is a variable.

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