lkml.org 
[lkml]   [2007]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Disk spin down issue on shut down/suspend to disk
Tejun Heo wrote:
> Michael Sedkowski wrote:
>>> Hmmm... If the problem only shows up on nx6325, it might be that ACPI is
>>> pulling unnecessary stunt. Please apply the attached patch and report
>>> when the disk spins down and up.
>> Disk spins down on "Pre-shutdown prepare" and then goes up and down on
>> "Power down".
>
> Oh... crap, so acpi wants to sync cache on shutdown. I wonder whether
> it spins down the disk correctly. Does emergency unload count increase
> after each power down? Also, please post the result of 'dmidecode'.

I know that my Compaq X1000-series laptop does do some kind of ACPI
games with the disk on ACPI power off (I assume it is putting the disk
in standby before power-off at least). It also does this if you boot
into DOS, GRUB, etc. and then hit the power button. Could be if the disk
is dumb enough to spin up for sync cache and standby when there is
nothing to flush, and the kernel does its own standby, this could cause
an extra spinup/down..

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-07 01:35    [W:0.893 / U:0.792 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site