Just FYI, udisks2 handles drives (at least in 14.04+) and you can configure things like APM level for individual disks by putting an entry into /etc/udisks2 with a filename that matches the drive id and serial number (which you can read from gnome-disks/palimpsest), eg with the contents:
[ATA]
StandbyTimeout=60
Do "man 8 udisks" for more info about the format of the file.
Just FYI, udisks2 handles drives (at least in 14.04+) and you can configure things like APM level for individual disks by putting an entry into /etc/udisks2 with a filename that matches the drive id and serial number (which you can read from gnome-disks/ palimpsest) , eg with the contents:
[ATA]
StandbyTimeout=60
Do "man 8 udisks" for more info about the format of the file.