Am 10.07.2012 00:24, schrieb Robert Trace:

Also, TURs don't appear to actually wake the disk up (should they?).
The only thing I've found that'll wake the disk up is an explicit START
UNIT command.

I haven't checked the scsi logging side, but about the only commands
that wake up the disks are 'smartctl -a /dev/sda' and 'sg_start'
(smartcl maybe issuing a START UNIT command on it's own).

Matthias