> All systems 233MHz SA110 + DC21285 including CATS & EBSA285
>
> raw reads:
>
> controller 	FCLK	PCI	disk		mod	size	rate
>
> ALI1543		50	33	7200maxtor	UDMA2
> 128MB	14.9MB/s
> ALI1543		50	33	5400maxtor	UDMA2
> 128MB	12.2MB/s
> ALI1543		50	33	4000quantum	DMA2
> 128MB	7MB/s
> PDC20262	50	33	5400quantum	UDMA2	128MB	11.2MB/s
> PDC20246	50	25	5400quantum	UDMA2	128MB	8.9MB/s
>
> ISP1040		50	25	5400ibm		SCSI
> 128MB	8.4MB/s

As I see it the writes would be equally interesting barometer of disk
performance. Our experience with the EBSA has indicated that dma reads are
in decent bursts, but those of the writes are far to small and numerous to
get anything like the performance on the reads. We looked at this a while
back so I dont have the timings right now...

What is your write performance like?

Cheerio
Mark Randelhoff