[vox-tech] Poor SATA performance

[Ken Bloom]

Ryan Castellucci wrote:
> I'm using 4 SATA hard drives on a SYBA SD-SATA-4P SATA card (Silicon Image
> SIL3114A chipset) and I'm only getting 17MB/sec with hdparm -t on the drives,
> and cpu utilization goes up to 100% while the test is going on. I'm running
> this from knoppix 3.8, using 2.6.11.
>
> Anyone got any ideas? Does this SATA chipset just suck, or is something set
> wrong?
>

Is DMA enabled? Without DMA, every access has to go through the
processor, which would explain the 100% CPU utilization.

--Ken Bloom

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