In message <[EMAIL PROTECTED]>you write:
>"H.Oura FCT Headquarters??" wrote:
>>
>> Hi,
>> I've calculated data transmission rate of my SCSI-2 disk.
>
>No, you haven't. You've calculated the combined transfer period of
>128KB + the overhead and latency of a single command creation,
>initiation, response, and teardown.
[snip]
Sorry, that's right.
It's not data transmission rate of SCSI-2 disk.
[snip]
> A quick start though might be to issue a
>series of TEST_UNIT_READY commands to isolate the command startup,
>initiation, completion, and teardown latencies. Get a msec measurement
>on that command, then subtract it from 24msecs and that will give you
>how much time was spent sending the 128K to the drive.
I've got a msec of TEST_UNIT_READY. It was 8msec.
So, 128KB data sending time = 24msec - 8msec = 16msec.
reculculated data transfer rate = 8.2MB/sec.
(That's much better than the 1st one)
Thanks to Doug and lance for advice.
Hironobu Oura
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