Re: [PATCH] laptop-mode for 2.6, version 4 + smart_spindown
From: Bart Samwel
Date: Thu Dec 25 2003 - 16:50:22 EST
John Bradford wrote:
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.
Hmmm, I think I've found the problem, hidden in the drive info. hdparm
-I also says:
Capabilities:
[...]
Standby timer values: spec'd by Standard, with device specific
minimum
I think it's the device specific minimum that got me, -S 4 equals 20
seconds, which is probably a lower value than the drive is capable of
supporting. A bit nasty that the drive accepts the -S 4 setting, but
just doesn't do anything with it. An error would have been nice. Anyway,
the smart_spindown script does work for lower values, so I guess I'll
use that instead. It has some added benefits as well, so I'm not too
disappointed.
Bart
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