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Author Topic: SCSI CF slower than IDE CF...Why?  (Read 4676 times)

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Offline alexh

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Re: SCSI CF slower than IDE CF...Why?
« on: November 19, 2008, 08:40:21 PM »
Quote

X-ray wrote:
You got two bottlenecks

Where?

Quote

X-ray wrote:
the CF adapter

Which is just a WIRE. Obviously no bottleneck here.

Quote

X-ray wrote:
and the IDE to SCSI converter

The Acard AEC-7720U (if he's using that) has a bandwidth of at least 20Mbyte/s which is roughly 5x that of most Amiga SCSI cards. Again no bottleneck.

There will be a latency through the IDE->SCSI so if it is transferring very small files then speed will appear slower than it really is. You need a GOOD speed test to prove it. I dunno if there are any good HD speed programs on the Amiga?
 

Offline alexh

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Re: SCSI CF slower than IDE CF...Why?
« Reply #1 on: November 19, 2008, 11:54:25 PM »
Most old disk speed programs are useless with modern drives. Either the data never leaves the CACHE or the transfer requests are that small that latency becomes more apparent than transfer rate.