>
> Attached to the primary channel are the following disks:
>
> wd0 at atabus0 drive 0: <WDC WD800JB-00ETA0>
> wd0: drive supports 16-sector PIO transfers, LBA48 addressing
> wd0: 76319 MB, 155061 cyl, 16 head, 63 sec, 512 bytes/sect x 156301488 sectors
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
> wd1 at atabus0 drive 1: <FUJITSU MPG3204AT E>
> wd1: drive supports 16-sector PIO transfers, LBA addressing
> wd1: 19546 MB, 39714 cyl, 16 head, 63 sec, 512 bytes/sect x 40031712 sectors
> wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
>
> FYI this is an Asus A7V8X-x motherboard.
>
> > If you could also check if the disks are busy, there's a list on the
> > bottom left of systat vm, or use systat iostat as well.
>
> Will check, but afaict for now, the disk led gets "stalled" when the system
> goes slow.
>
> Cheers.

isn't some sort of master/slave inefficiency making such stalls? are both
disks accessed same time?

there is nothing special to get 400-500 irqs/second under disk load - but
not 75% CPU