Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site uw-beaver
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxb!mhuxn!mhuxm!mhuxj!houxm!vax135!cornell!uw-beaver!info-mac
From: info-mac@uw-beaver
Newsgroups: fa.info-mac
Subject: Winnie (the disk)
Message-ID: <833@uw-beaver>
Date: Tue, 12-Feb-85 03:22:07 EST
Article-I.D.: uw-beave.833
Posted: Tue Feb 12 03:22:07 1985
Date-Received: Wed, 13-Feb-85 03:06:53 EST
Sender: daemon@uw-beaver
Organization: U of Washington Computer Science
Lines: 21

From: (Neil Groundwater [stug]) npg@lbl-csam

I have seen much discussion of the merits of power-up/power-down on
overall reliability and silicon-shock.  But no one has discussed the
impact of power-cycling winchester disk drives.

Specifically, can someone comment on whether Lisa 2/5, 2/10, Mac XL,
and/or HyperDrive should be left ON or OFF when not in use.  Typical
user-duty cycles are using the system most week-days for 4 to 10 hours.
During the day I expect to leave the system ON but I am curious whether
good habits suggest power-down overnight, over weekends, or only
when I need to move the machine.

What are the relative merits of "landing" the head versus spinning out
the bearing life?  We leave our 2/5 drives on all week and shut them down
on weekends, generally - the mother-ship is shut off most nights.
The 2/10 has a fan (nice and quiet, too) on the disk drive, but we
shut it off entirely most nights.   HyperDrive has a fan which runs when
warm - I'm expecting to upgrade to one this week and I will post
their recommendations when I learn them.
   ...Neil Groundwater