Access Statistics

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Access Statistics

Postby Doug G » Sat Sep 23, 2006 6:51 pm

Using the late Glen Bredon?s Prosel 16 utility Volume Repair, Statistics on Disk Access, I came up with these numbers. The results are the average of 3 runs.

Using the Apple Hi-Speed SCSI card with a Quality Computer Q Drive 40MB:
Linear Read = 1.75 ms
Random Read = 24.84 ms
OS Overhead = 8.79

Using the RamFast SCSI Rev. D card, ROM 3.00j, with the Q Drive:
Linear Read = 1.57ms
Random Read = 14.4ms
OS Overhead =1.01ms

Using the CFFA card with 2GB Sandisk card
Linear Read = 3.18
Random Read = 3.83
OS Overhead =0.34
Doug G
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Joined: Sun Jul 09, 2006 6:08 pm

Re: Access Statistics

Postby rich » Fri Sep 29, 2006 12:50 am


Very cool!!

That is pretty much what I would have expected. My CFFA can't keep up on linear reads, because I do not have DMA. Although it only appears to be a factor of 2. I would have expected the RAMFast to be even faster.

On Random read I totally smoke the others, because there is zero seek time.
Of course if you where to use a DMA based IDE controller with a CF card attached, you would get the best numbers.

Overall though, I am pretty happy with those numbers.

Um, I assume the CFFA number are in "ms" too, and not seconds right?
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Location: Wisconsin

Postby Doug G » Fri Sep 29, 2006 4:07 pm

Yes, "ms".

I'm very pleased with the performance also.

I've been using Ciderpress to back up the card on my PC.
That utility is great for this purpose.

Doug G
Posts: 4
Joined: Sun Jul 09, 2006 6:08 pm

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