AHCI powersaving issue

[Warren Block]

On Wed, 25 Jan 2012, Michael BlackHeart wrote:

> Hello, I've a trouble with new achi driver on currently 9 release, but
> it was the same on 8-stable. I've have an:
>
> smartctl -a /dev/ada0
>
> === START OF INFORMATION SECTION ===
> Model Family:     Western Digital Scorpio Blue Serial ATA
> Device Model:     WDC WD3200BEVT-22A23T0
> Serial Number:    WD-WXL1AB086780
>
> And there's an idle state disabled by wdidle3 v1.05.

I think I have that same drive.  wdidle ran without errors, but the 
drive still parks eight seconds after the last access.  If the problem 
isn't in the firmware, it would be nice to get some use out if it; 
there's a noticeable delay while the heads load.

There's the brute-force method of waking it up with a camcontrol command 
or just touch a file every five seconds or so.