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From: dbw@crash.UUCP
Newsgroups: comp.sys.mac
Subject: Re: MacStack information?
Message-ID: <1200@crash.CTS.COM>
Date: Wed, 10-Jun-87 09:17:06 EDT
Article-I.D.: crash.1200
Posted: Wed Jun 10 09:17:06 1987
Date-Received: Sat, 13-Jun-87 04:24:48 EDT
References: <611@entropy.ms.washington.edu>
Reply-To: dbw@crash.CTS.COM (David B. Whiteman)
Distribution: na
Organization: Crash TS, El Cajon, CA
Lines: 17
Keywords: MacStack hard disk, CMS


All a CMS 20 MacStack is internally is a Seagate 225N 20 meg drive with a case
and power supply.  This is the equivalent of half of the Apple HD-20 SCSI and
the exact equivalent of the internal hard drive in the MacII.  The Hyperdrive
FX-20 and Jasmine 20's are also internally Seagate 225N drives.  The CMS 20
drive is rugged and has a carrying handle; however, I don't know how safe the
data is you carry the drive everywhere.  Two of my friends lug the things back
and forth to work with losing any data.  They, however, format and use the AppleHD-20 SC software instead of the CMS format program.  They also use a custom
head parking program which I wrote.  If you run Disktimer II on a CMS drive that
was formatted with CMS software you will find that it is very slow; if you format with the Apple software instead, you will get the same results that the
Apple HD-20SC yields.  On a BBS in Orange County the CMS programmer admitted that
he thought that "blind" reads and writes are unsafe, so his driver uses single
block non-blind read and writes only.  Anyway my two friends have had no problem

with the drive, so it should be a safe buy.  CMS also makes a drive which has
room for a second drive, so if you get more money you should be able to upgrade
this second one with little fuss.