Messages in this thread | | | Date | Wed, 02 Aug 2006 03:23:06 +0900 | From | Tejun Heo <> | Subject | Re: 2.6.18-rc2, problem to wake up spinned down drive? |
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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.
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