Path: utzoo!attcan!uunet!samsung!usc!pollux.usc.edu!kurtzman
From: kurtzman@pollux.usc.edu (Stephen Kurtzman)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Removable hard drive info sought
Message-ID: <27169@usc.edu>
Date: 16 Sep 90 03:00:33 GMT
References: <33829@cup.portal.com> <37@genco.uucp>
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In article <37@genco.uucp> rad@genco. (Bob Daniel) writes:

>I have an APS SyQuest ...

I have an Ehman Syquest removeable.

>>Can you switch cartridges without
>>shutting down and rebooting?  
>Yes!  It works very similar to a floppy.  Ocassionally it may not mount
>but there is an FKEY called "Mount'Em" which allows you to mount any SCSI
>device available.

The Ehman also comes with an init that allows the cartridge to be
treated as a floppy.

>>Are they fast enough for general use?
>My SyQuest has 20ms access.  Running SCSI Evaluator, it showed 23ms (avg) in
>comparison to a Quantum that showed 27ms (and claimed to have 12ms average
>access). The speed and access is definitely acceptable for a removeable.

Using MacTools Optimizer to time the speed of accesses for the disks I
have on my SE/30, I get the following:

(Apple)      Miniscrib M8425 20MB internal: 53.33 ms/seek avg.
(POWERDrive) Seagate ST296N  80MB external: 22.78 ms/seek avg.
(Ehman)      Syquest  SQ555  44MB  external: 10.00 ms/seek avg.

Even without running a program to analyze the disk speeds, you can
tell that the Syquest is faster than the other disks.
-- 
-----
Stephen Kurtzman             | "where desire writhed there stands a stone
kurtzman@pollux.usc.edu      |  the change was sudden and complete"
                             |                              -- Maggie Roche