Messages in this thread |  | | | Date | Sun, 21 Sep 2008 05:58:14 -0400 | | From | Tejun Heo <> | | Subject | Re: [PATCH 2/2 v5] libata: Implement disk shock protection support | |
Elias Oltmanns wrote:
> On user request (through sysfs), the IDLE IMMEDIATE command with UNLOAD
> FEATURE as specified in ATA-7 is issued to the device and processing of
> the request queue is stopped thereafter until the specified timeout
> expires or user space asks to resume normal operation. This is supposed
> to prevent the heads of a hard drive from accidentally crashing onto the
> platter when a heavy shock is anticipated (like a falling laptop
> expected to hit the floor). In fact, the whole port stops processing
> commands until the timeout has expired in order to avoid any resets due
> to failed commands on another device.
>
> Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
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