/etc/hdparm.conf is ignored after wake from suspend

[Bazon]

Hello,

I want to spin down my external USB drive /dev/sdc as fast as possible:
/etc/hdparm.conf:

...
/dev/sdc {
	spindown_time = 1
}

that works, although I get

$ sudo hdparm -C /dev/sdc

/dev/sdc:
SG_IO: bad/missing sense data, sb[]:  f0 00 01 00 50 40 00 0a 00 00 00 00 00 1d 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 drive state is:  unknown

The problem is after a suspend (system, not disc) and resume again, /dev/sdc doesn't spin down automatically anymore.

Any ideas?

[Bazon]

OK, got it. In a terminal:

cd /etc/pm/sleep.d/
sudo touch 20-hdparm
sudo chmod +x 20-hdparm 
sudo gedit 20-hdparm

and there:

#!/bin/bash
case "$1" in
	thaw|resume)
		hdparm -S 1 /dev/sdc
		;;

esac