Path: utzoo!utgpu!cunews!mitel!testeng1!stanfiel
From: stanfiel@testeng1.misemi (Chris Stanfield)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Mac+ Internal HD
Keywords: Mac+, hard-drive, internal
Message-ID: <7976@testeng1.misemi>
Date: 16 May 91 19:52:51 GMT
References: <13260@dog.ee.lbl.gov>
Reply-To: stanfiel@testeng1.UUCP (Chris Stanfield)
Organization: Mitel CAE Services
Lines: 22

In article <13260@dog.ee.lbl.gov> osborn@ux1.lbl.gov (James R Osborn) writes:
>
>I *AM* going to install a Quantum LPS-52 SCSI drive
>inside my Mac+.  The drive says 6 watts.  It is a low
>profile, low power consumption drive.  My question is
>do I really have to spend $50 for a seperate 20 watt
>power supply for the drive?

The Mac+ supply is flakey - it is a very marginal design. I would
install the extra supply AND A FAN!!! A SCSI drive typically draws >2A
at 12V on startup, but typically uses only 0.5A at 12V when running.
The 5V drain is ~0.5A, so your low poer unit probably does all it
says, but it still may draw a lot of power on power-up, and the Mac
supply can't supply it. I suggest you test the drive - it doesn't hurt
to just power them up with nothing else connected, but have the
terminating resistors in.

Have fun!

Chris Stanfield, Mitel Corporation: E-mail to:- uunet!mitel!testeng1!stanfiel
(613) 592 2122 Ext.4960
We do not inherit the world from our parents - we borrow it from our children.