Dag-Erling Smørgrav wrote:
> Alexander Motin writes:
>> I've just added Power Up In Stand-by (PUIS) feature support into CAM
>> ATA in HEAD. It is one of the ways to implement staggered spin-up for
>> ATA devices. Now CAM will spin-up no more then 4 of such devices at a
>> time.
>
> Hmm, how do
On 2010-03-05 13:18, Dag-Erling Smørgrav wrote:
Hmm, how does that work? Doesn't the BIOS spin the disks up long before
the kernel even loads? Can you set a flag on the disk to tell it not
to?
A jumper (marked PM2 on WD disks; no idea for other brands). From
Wikipedia:
"[PUIS] can usually b
Alexander Motin writes:
> I've just added Power Up In Stand-by (PUIS) feature support into CAM
> ATA in HEAD. It is one of the ways to implement staggered spin-up for
> ATA devices. Now CAM will spin-up no more then 4 of such devices at a
> time.
Hmm, how does that work? Doesn't the BIOS spin
