Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!carssdf!usenet
From: usenet@carssdf.UUCP (John Watson)
Newsgroups: comp.unix.xenix.sco
Subject: Re: If you have Xenix 386, run this for me
Message-ID: <282@carssdf.UUCP>
Date: 23 Jan 91 00:21:56 GMT
References: <1991Jan16.094432.21159@eng.ufl.edu> <1991Jan19.173450.25227@bilver.uucp>
Distribution: usa
Organization: C.A.R.S.,Middlesex,NJ
Lines: 22

> >   Someone with Xenix 386 do me a favor and try the following on your
> >   machine (you'll have to be root to open the device).
> >	   dd if=/dev/rhd00 of=/dev/null bs=100k count=100
>  
> >I did and it took 33 seconds, system load was minimal at the time.  I
> >have version 2.3.3, an IDE controller and a Conner 105 meg drive.
> Ran this on an IBM 80, 20MHz '386, 2 megs memory, 110 Meg IBM ESDI
> drive, Xenix 2.2.3, and got 1:48.9 real time using the time command.
> For comparison on ESIX Unix V.2.D, with a 25 MHz '386, 8megs of memory,
> 8760E Maxtor ESDI drive with FFS got 0:17.9 real time.

I have been watching all this intently and wondering if I should switch
from Xenix 2.3.3 to SCO UNIX, just for the disk speed. My 486 is not
out of gas on CPU, but disk access is limiting us.  The 486-25 is generic.
The disk controller is Consensys Powerstore, 4Meg Cache on Controller,
ESDI Drives, CDC WREN V model 94196-766 (670Meg), & Fujitsu M2263E (687Meg).

I got   12.5 & 11.1 Sec. Real Time.  One drive is faster than the other,
but I don't know which.  I repeated several times.  CPU time is about 8 sec.

John Watson   Independent Consultant and Perl Disciple 
      ...!rutgers!carssdf!usenet