Re: [PATCH] laptop-mode for 2.6, version 4 + smart_spindown

[John Bradford]

> I've got another problem getting this stuff to work. The problem lies 
> with my HD: it just doesn't respect the spindown time, I've got it set 
> to hdparm -S 4 and it just doesn't spin down, even though there's no 
> activity whatsoever! hdparm -B 254 gives me:
> 
> /dev/hdb:
>   setting Advanced Power Management level to 0xFE (254)
>   HDIO_DRIVE_CMD failed: Input/output error
> 
> It's funny, because hdparm -I gives me:
> 
> Commands/features:
>          Enabled Supported:
> [...]
>             *    Power Management feature set
> 
> So, it should support this. Apparently it doesn't. :( The drive is a WD 
> 800BB. Does anyone have any clue what could cause this?

No, but I've definitely seen other drives, (old Toshiba ~100 MB ones),
which respect 'spin down immediately' commands, and don't support the
spin down inactivity timer.  I can't remember whether they report
Power Management feature set supported or not, though.

John.
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