[comp.sys.ibm.pc] wd1006 and Norton SI

eehamid@cybaswan.UUCP (ia.hamid) (05/02/90)

In article <17100051@ux1.cso.uiuc.edu>, cs122bm@ux1.cso.uiuc.edu 

Michael writes:

> 	Some of Western Digitals controllers, such as the WD1006V-MM2, have
> on-board caches. For some reason these caches confuse the heck out of the
> Norton SI and you wind up getting a slower rating than you should.

Thanks for the reply.

Since I posted the question, I have installed Windows386 on my machine and
configured the 2Mb both as extended and expanded mem. using emm386. I also
installed Smartdrv to use the expanded mem. as a disk cache and ran the same
Norton test. Guess what Michael? I got a new DI and PI. Is Norton affected
by hardware caches only? 

By the way, I could not run Win386 with the emm386 running. I got a
"Protected mode software already installed" error. Any suggestion here
will also come in handy.

Thanks alot.
 

byoder@smcnet.smc.edu (Brian Yoder) (05/03/90)

In article <1782@cybaswan.UUCP> eehamid@cybaswan.UUCP (ia.hamid) writes:
>	I have just finished installing a WD1006-MM2 HD controller into my
>386-20 machine and reformated my ST251-1 at 1:1 interleave using Disk Manager.
>	I had a WA2 controller which gave only an optimal interleave of 2 and
>data transfer rate of 200 Kb/s. That was slowing down my machine performance
>somewhat. I noted some performance figures before removing this controller;

>	Norton SI 	: 21.1 (Adv. 4.5)
>	       DI	:  3.4 (Disk Index)
>	       PI	: 15.1 (Performance INdex).  

>With the new controller operating, I have done a similar test but to my own
>astonishment none of the figures above changed. I can understand why SI index
>remained the same but I expect some changes in the DI and PI figures! Can
>anyone out there enlightened me please ?

The DI statistic is a combination of two figures.  One is the data transfer
rate from the disk which might not change with the addition of your new
controller.  The other is a measurement of track-to-track seek time. Again
this may not change with a new controller.  Future versions of SI will
include more than just these two factors in your disk performance
index.

Good Luck,
Brian Yoder

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