quickindex DMA transfer observations.

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Article #2129

#2129

From: Frans Meulenbroeks
Date: Fri, 30 Jun 1989 07:08

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1387 bytes

Hi!

Yesterday I noticed something peculiar with respect to the quickindex
program (that is qindex15.prg).

I wanted to compare my new hard disk with the floppy drive, by
means of testing the DMA transfer rate using qindex15.

The results were amazing:
partition C does about 8300 %
partition D and E do about 5600 %

The drive in question was just formatted.
Why is there a difference for the various partitions?
Is this due to the algorithm? the disk?
the way partitions are placed on the disk with respect to cylinders
etc?

(Side question: will a partition always contain only complete
 tracks? or even complete cylinders??)

I'm totally puzzled with this. 
Of course 5600 % is ok, but 8300 % is definitely more likable.

regards,
Frans Meulenbroeks        (meulenbr@cst.prl.philips.nl)
	Centre for Software Technology
	( or try: ...!mcvax!phigate!prle!cst!meulenbr)

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From: meulenbr@cstw01.prl.philips.nl (Frans Meulenbroeks)
Newsgroups: comp.sys.atari.st
Subject: quickindex DMA transfer observations.
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Date: 30 Jun 89 07:08:23 GMT
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Organization: Centre for Software Technology, Philips Eindhoven
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