Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!noao!arizona!naucse!rrw
From: rrw@naucse.UUCP (Robert Wier)
Newsgroups: comp.sys.mac.hardware
Subject: Re: DiskTimer II times?
Summary: followup
Message-ID: <1947@naucse.UUCP>
Date: 13 Mar 90 22:54:21 GMT
References: <1944@naucse.UUCP>
Organization: Northern Arizona University, Flagstaff, AZ
Lines: 35



A followup note to my posting on using DiskTimer II:

Several people suggested I give SCSI evaluator a try, and here are the
results:

               Wren Runner     Quantum 40 meg        HD20SC
                 external         internal             external

access            12 ms             22 ms              70ms

read rate       12,600 kbits/s     5,000 kbits/s      1,000 kbits/s

supplemental information:

 Access times are not supposed to be affected by the machine to which the
drive is attached.  The 12 ms for the Wren Runner agrees nicely with the
advertised 10.5 ms.  The 70ms for the HD20SC is probably because it's 
formatted with 3:1 interleave for use on a Plus (or is it just generally
a dog?).  

Read rates for the Runner and Quantum were when connected to a MacIIci,
averaged over several runs.  The HD20SC is connected to a Mac SE.
(No wonder it seems slow in comparison to the ci with the Runner!)


Many thanks to those who responded to my message!

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  - Bob Wier                             Northern Arizona University
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