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DateTue, 06 Jun 2006 16:10:11 +0900
FromTejun Heo <>
SubjectRe: [git patch] libata resume fix
Jens Axboe wrote:
>> Can you measure spin up time for your 15k's?  Some controllers can't 
>> catch the first D2H FIS after POR and have to wait unconditionally for 
>> spin up for hotplug & resuming from suspend.  Currently 8 sec wait is 
>> used but it seems insufficient for your drives.  Failing to spinup in 
>> that 8 secs would probably result in timeout of the first reset attempt 
>> and retrial - which currently takes > 30 secs.
>>
>> Spin-up time can be measured by first issuing STANDBY and then time how 
>> long IDLE IMMEDIATE takes, I think.
> 
> The 15K RPM is a SCSI drive, I haven't seen any SATA 15K rpm drives yet.
> I have the same model in another box, I can measure spinup with
> START_STOP unit there. I will do so later today, when I fire it up, if
> you still want to know?
> 

Arggh.. Confused w/ 10k drives.  But it would be nice to know spin-up 
time for 15k's if it doesn't waste too much of your time.

Thanks.

-- 
tejun
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