Xref: utzoo comp.sys.ibm.pc:15484 comp.sys.misc:1408
Path: utzoo!attcan!uunet!portal!cup.portal.com!Paul_L_Schauble
From: Paul_L_Schauble@cup.portal.com
Newsgroups: comp.sys.ibm.pc,comp.sys.misc
Subject: Re: Disk Controller Question ?
Message-ID: <5357@cup.portal.com>
Date: 12 May 88 07:43:20 GMT
References: <1255@kodak.UUCP>
Organization: The Portal System (TM)
Lines: 16
XPortal-User-Id: 1.1001.3295

RLL controllers require a disk drive that has tighter specifications for
bit timing than the regular controllers do. This is effectively a requirement
for better signal to noise ratio in the disk head, analog electronics, and
clock circuitry. Many modern disks meet the requirements and work fine
even though they are not certified by the manufacturer.

As I recall, your disk is one of the older ones. It may appear to work, but
you will be operating with no margin for error. One day the room temperature
may be different or the line voltage a bit low, and you'll start getting
data errors. If you don't have important data on the machine, keep your
backups current and try it.

NOTE that there is now way to damage the disk drive or the media by using
an RLL controller. If it doesn't work, just go back to the regular one.

    Paul