Tejun Heo wrote:
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.
Given that the data from the "cat" of state returned a zero with
newline, perhaps unreasonably picky. On a Fedora kernel it just doesn't
seem to work for SATA drives, sample size = 1.
--
Bill Davidsen <[email protected]>
Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a
normal user and is setuid root, with the "vi" line edit mode selected,
and the character set is "big5," an off-by-one errors occurs during
wildcard (glob) expansion.
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