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From: phil@brahms.amd.com (Phil Ngai)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Can you RLL format the Seagate ST251 drive?
Message-ID: <1990Sep10.162707.18613@amd.com>
Date: 10 Sep 90 16:27:07 GMT
References: <4285@trantor.harris-atd.com>
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In article <4285@trantor.harris-atd.com>
sonny@trantor.harris-atd.com (Bob Davis) writes:
|
|	Have you ever RLL formatted an ST251 42Mb MFM drive? Can you

Yes, with a WD1006V-SR2. For about a year now with no problems.
ST4096 too. (I have 180 megabytes).

|	Does the 50% increase in drive capacity under RLL formatting
|compared to MFM *always* come because there are 26 sectors/track for RLL, 
|and only 17 sectors/track for MFM? And therefore does one always use
|the SAME number of cylinders and heads for RLL as for MFM?

Yes. RLL simply increases the data bit density (but NOT the flux
transition density) and does not affect the geometry (#tracks and
#heads) at all.

--
Phil Ngai, phil@amd.com		{uunet,decwrl,ucbvax}!amdcad!phil