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From: kaleb@mars.jpl.nasa.gov (Kaleb Keithley)
Newsgroups: comp.sys.ibm.pc
Subject: RLL controller with 31 sectors/track?
Message-ID: <2642@jato.Jpl.Nasa.Gov>
Date: 22 Jan 90 21:15:25 GMT
Sender: news@jato.Jpl.Nasa.Gov
Reply-To: kaleb@mars.jpl.nasa.gov (Kaleb Keithley)
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Organization: Jet Propulsion Laboratory, Pasadena, CA.
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I've got a Western Digital W1002 1:1 RLL controller on my system, and
over the weekend, while adding another drive to my system, I came across
a reference to 31 sectors per track.  In the ROM setup, if you specify
manual entry of drive parameters, after setting cylinders, heads, and
write precomp, it will let you specify 26 or 31 sectors per track.  Now
this is interesting to me, because I've never heard of 31 sector RLL.
The only thing I've heard of with that kind of sector count is ESDI drives
which have, I believe, 35 sectors per track.

I tried formatting my disk at 31, and needless to say, it wasn't successful,
but....

Anyone out there know anything concrete about this?  Who makes drives that
will RLL to 31 sectors?  What do they cost?


Chewey, get us outta here!
                 
kaleb@mars.jpl.nasa.gov             (818)354-8771
Kaleb Keithley