From: Tejun Heo <htejun@gmail.com>
To: Harald Dunkel <harald.dunkel@t-online.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.18-rc2, problem to wake up spinned down drive?
Date: Wed, 02 Aug 2006 03:23:06 +0900 [thread overview]
Message-ID: <44CF9C0A.8090405@gmail.com> (raw)
In-Reply-To: <44CF9A23.9090409@t-online.de>
Harald Dunkel wrote:
> Tejun Heo wrote:
>> Can you try the following instead of hdparm?
>>
>> echo 1 > /sys/bus/scsi/devices/1:0:0:0/power/state
>>
>> It will make libata involved in putting the disk to sleep and waking it
>> up, and, when waking, it will kick the drive in the ass by resetting the
>> channel. Please try with the latest -rc kernel.
>>
>
> Sorry to say, but this did not work:
>
> # echo 1 > /sys/bus/scsi/devices/0:0:0:0/power/state
> bash: echo: write error: Invalid argument
> # ll !$
> ll /sys/bus/scsi/devices/0:0:0:0/power/state
> -rw-r--r-- 1 root root 0 Aug 1 20:00 /sys/bus/scsi/devices/0:0:0:0/power/state
> # cat !$
> cat /sys/bus/scsi/devices/0:0:0:0/power/state
> 0
> # uname -a
> Linux bugs 2.6.18-rc3 #2 PREEMPT Sun Jul 30 16:26:22 CEST 2006 i686 GNU/Linux
You probably should do 'echo -n 1', the parsing function is pretty picky.
--
tejun
next prev parent reply other threads:[~2006-08-01 18:23 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-30 12:01 2.6.18-rc2, problem to wake up spinned down drive? Harald Dunkel
2006-07-30 12:22 ` Johannes Weiner
2006-07-30 12:57 ` Harald Dunkel
2006-08-01 16:16 ` Tejun Heo
2006-08-01 18:14 ` Harald Dunkel
2006-08-01 18:23 ` Tejun Heo [this message]
2006-08-02 16:56 ` Bill Davidsen
2006-08-05 19:32 ` Harald Dunkel
2006-08-05 21:23 ` Pavel Machek
2006-08-07 3:07 ` Tejun Heo
2006-08-07 18:43 ` Harald Dunkel
2006-08-07 19:26 ` Tejun Heo
2006-08-08 18:40 ` Bill Davidsen
2006-08-08 18:59 ` Tejun Heo
2006-08-02 10:18 ` Pavel Machek
2006-08-03 5:44 ` Harald Dunkel
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