This behaviour still seems to be present in 17.04. I have a secondary drive (ST3500418AS) that is isn't mounted and should remain asleep. It doesn't go to sleep unless I force it with "hdparm -Y /dev/sdb". There is something that happens every 10 minutes that will wake up the drive.
I think there is something wrong with libatasmart because just checking the state seems to change the state (Heisenberg?). Running "hdparm -C /dev/sdb" will actually wake the drive up. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1281588 Title: Disk standby timer is broken To manage notifications about this bug go to: https://bugs.launchpad.net/udisks/+bug/1281588/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
