On 11/06/2009 20:45, Michael Ole Olsen wrote:
[...]
it seems there is 21ms wait time for each request due to this pci slowness. (await is in miliseconds)
might be the controller that isnt so fast to do simultaneous read and writes,
perhaps because its NCQ support might be bad?
so I don't really have more ideas, except to buy a new controller card from a better brand (Adaptec) :(
I have no personal experience of SIL SATA cards, but they've been
mentioned before as being behind slowness. It's also possible something
else on your PCI bus is choking things, so before you go and blow lots
of real money on a better brand, what else is on your PCI bus? Please
tell me the output of `lspci -tv` and the contents of /proc/interrupts
twice (before and after a short delay, e.g. `cat /proc/interrupts ;
sleep 5 ; cat /proc/interrupts`).
Cheers,
John.
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