Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!lll-winken!scooter!neoucom!wtm
From: wtm@neoucom.UUCP (Bill Mayhew)
Newsgroups: comp.sys.amiga
Subject: Re: Hard disks for 2090A
Summary: ST-225 probably OK
Message-ID: <1387@neoucom.UUCP>
Date: 27 Oct 88 19:29:50 GMT
Article-I.D.: neoucom.1387
References: <1929@van-bc.UUCP>
Organization: Northeastern Ohio Universities College of Medicine
Lines: 22


While I don't have any experience with ST-225 drives attached to
the 2090 / 2090A controller card for the Amiga, I do have
experience with ST-225s connected to lots of other things.  My
experience has been that ST-225 reliability is about average
compared to other brands.  Out of about 150 ST-225s in use here,
one has failed in the last year.  Most of the drives are less than
two years old.  I think the MTBF for the ST-225 is around 25,000
hours, so our failure rate is in the correct statistical range
compared with Seagates claims.

The one drive that did fail had only a few hundred hours on it.  I
tested it, and it showed that the RPM was 3499 when it should have
been 3600.  My guess is that the spindle motor control IC went bad.

As far as I can tell, it only looks like a lot of ST-225s go bad
because there are so many in the installed base.  The only thing
you have to watch out for is that you don't use too long mounting
screws, which can deform the case of the drive.  As long as you
don't go overboard tightening the mounting screws, all should be
fine.

--Bill