Bug 730095

Description of problem:
My external HDD is Toshiba Store alu2. In Windows it's regular way of working is: when system is on and USB powered HDD stays active, then if you "safely remove" or turn off computer disk go into sleep when it's safe to turn off electricity. In linux (not only Fedora) if I simply turn off computer disk stays put, so I've done some check and found option to "safely remove" in Nautilus. But it did not work as intended. The HDD gone sleep and awakens straight away, partition mounts again and then after about 30 seconds when it finalize mounting I'm able to "safely remove" again and it works this time alright. First I thought it's Nautilus fault, but I was suggested by someone to do udisks --unmount /dev/sda1 and then udisks --detach /dev/sda, but it also neeeds doubling to work. I also tried logging out of X11 and doing it in bare console but still no lock. The output of dmesg | tail gives:
[   69.399701] sd 10:0:0:0: [sda] Write Protect is off
[   69.399713] sd 10:0:0:0: [sda] Mode Sense: 38 00 00 00
[   69.408677] sd 10:0:0:0: [sda] No Caching mode page present
[   69.408687] sd 10:0:0:0: [sda] Assuming drive cache: write through
[   69.438673] sd 10:0:0:0: [sda] No Caching mode page present
[   69.438685] sd 10:0:0:0: [sda] Assuming drive cache: write through
[   73.662860]  sda: sda1
[   73.718779] sd 10:0:0:0: [sda] No Caching mode page present
[   73.718792] sd 10:0:0:0: [sda] Assuming drive cache: write through
[   73.718801] sd 10:0:0:0: [sda] Attached SCSI disk
after my first attemt to detach.

Version-Release number of selected component (if applicable):


How reproducible:
does it every time

Steps to Reproduce:
1.Turn on computer with USB_HDD attached to port.
2.Unmount all partitions of HDD then execute udisks --detach /dev/sdx
3.The HDD will detach and reattach again
  
Actual results:
HDD reattaches itself and mounts again

Expected results:
HDD goes to sleep

Additional info: Fedora 15 64bits with gnome 3, athlone CPU