Re: Hard drive speeds...

[jlee@ics.uci.edu (Orion Pax)]

Peter F Handel (handel@lars.acc.stolaf.edu) wrote:
: In article <35f0s4$knn@hermes.louisville.edu> twdorr01@starbase.spd.louisville.edu (Thomas Dorris) writes:
: >I'm curious about the various speed ratings of some popular hard drive units.
: Here are some access times of various common storage devices tested on a ROM 01
: GS @ 8Mhz/16k ZipGSX.  The SyQuest drive is a 44MB Removable hooked up to an
: Apple High Speed DMA SCSI card.
:  
:  
: Time in milliseconds!  Measured with ProSEL 16 v8.84
: Device         Linear Read    Random Read    OS Overhead
:  
: HS DMA SCSI SyQuest   1.11          24.00          7.33
: Vulcan 40Meg          4.85          15.57           .42
: /RAM5 w/Sys6 Driver    .82        1.57-1.63         .39
:  
: *: When the RAMDisk was at 32k, the Random Read rate was 9.57ms.  At 128k, it
: was 7.49ms; at 256k, 7.20ms; and at 512k, the rate was 7.16ms.

Here's mine on a ROM 01 GS @ 14/64 ZipGSX.  The HDD is a 210 Maxtor internal
hooked up to a RAMFast 256k with times taken from ProSel v8.8.4.

Device         Linear Read    Random Read    OS Overhead
Pegasus 210Meg        1.06          14.74          0.69
/RAM5 w/Sys6 Driver   0.64           1.60          0.24

* RAM5 is 800k

Anyways, looks like the RAMFast and the HS SCSI has the edge over the Vulcan
for linear reads, and the RAMFast is 'bout the same as the Vulcan for random
read and OS overhead.

Now we just need timings from the TurboIDE. :)

Joseph
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