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From: dragon@oliveb.UUCP (Give me a quarter or I'll touch you)
Newsgroups: comp.sys.amiga
Subject: Re: Cheap hard disks (more low prices)
Message-ID: <10033@oliveb.UUCP>
Date: Wed, 2-Dec-87 13:35:54 EST
Article-I.D.: oliveb.10033
Posted: Wed Dec  2 13:35:54 1987
Date-Received: Sun, 6-Dec-87 02:19:55 EST
References: <5489@oberon.USC.EDU>
Organization: Dragon Technology, Inc. San Francisco, USA
Lines: 39

in article <5489@oberon.USC.EDU>, papa@pollux.usc.edu (Marco Papa) says:
> 
> About the possible fact that the Seagate ST238 is an RLL drive, I thought
> that Seagate used the following conventions:
> 
> - No letter appended to drive designation means ST412 drive using MFM encoding
>   (supported by the A2090)
> - letter "R" appended, means ST412 using RLL encoding (NOT supported by
>   the A2090)
> - letter "L" appended, means SCSI drive (supported by A2090)
> 
> So for example, there is an ST251, an ST251R, and an ST251N.  Please correct
> me if I am wrong. 
> 
> -- Marco Papa


Seagate's ST238 is an RLL drive.

From the Seagate documentation:

	"Only drives with an 'R' appended to the product number are
	designed and certified for use with a Run Length Limited (RLL 2,7)
	controller.  Note: early ST238 RLL drives did not have the 'R'
	suffix."

The letter 'N' appended means a SCSI drive, not 'L' (but the example was
correct).

Just as a side note, many of the SCSI interface drives use RLL encoding,
but this is transparent to the SCSI interface.



-- 
Dean Brunette               {ucbvax,etc.}!hplabs!oliveb!olivej!dragon                                    {ucbvax,etc.}!hplabs!oliveb!dragon-oatc!dean                                       
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