On Sun, 2021-06-13 at 14:38 -0600, Chris Murphy wrote:
> I actually use a udev rule for idle spin down:
>
> $ cat /etc/udev/rules.d/69-hdparm.rules
> ACTION=="add", SUBSYSTEM=="block", \
> KERNEL=="sd*[!0-9]", \
> ENV{ID_SERIAL_SHORT}=="WDZ47F0A", \
> RUN+="/usr/sbin/hdparm -B 100 -S 252 /dev/disk/by-id/wwn-
> 0x5000c500a93cae8a"
> $
BTW, the reason I don't do this is that one of the drives doesn't
accept the APM spin-down command:
$ sudo hdparm -B 100 -S 24 /dev/disk/by-id/wwn-0x50014ee058f952e1
/dev/disk/by-id/wwn-0x50014ee058f952e1:
setting Advanced Power Management level to 0x64 (100)
HDIO_DRIVE_CMD failed: Input/output error
setting standby to 24 (2 minutes)
APM_level = not supported
poc
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