Try to put my external drive to standby mode if no access for a while. By default (not sure if volume 2 has this feature or not), nothing happens. Try hdparm, not works. Hd-idle seemed to work for the first time (after reboot) but suddenly my drive woke up after minutes and never set to standby anymore. Tried restart hd-idle, the drive fell to sleep well but again, woke up after minutes. And so on…
Try to remove udisks and disks-glue and mount the drive manually. Now hd-idle seems to work fine (I’m gonna update to morrow), so I guess there’s a bug with udisks.