My USB 3.0 drives turn on after I turn them off in the Disks utility.

I've disabled auto-mounting via org.gnome.desktop.media-handling.automount. This worked as expected but doesn't help with my power on/off problem.

This only seems to happen when I use dd to write a disk image. Here's my workflow:

  1. Insert a USB drive from step 6
  2. Write USB drive using sudo dd if=someFile of=/dev/sdb bs=8M oflag=sync && sync
  3. Power down USB drive in "Disks" GUI. The drive disappears from the Devices list
  4. Wait a second. The drive reappears in the Devices list.
  5. Repeat (3). The drive continues to reappear.
  6. Remove drive from PC anyway.

I'd like to cut out steps 4 and 5. Why is the device being re-enabled?

I'm using 14.04.

  • hey OP, I didn't notice your post before, but I'm having the exact same issue – wjandrea May 30 '15 at 2:44
  • try to turn off with hdparam – totti May 30 '15 at 4:26

Did you try some other dd/usb-port/usb-cable ?

I had the same problem with my old DD. It was not getting enough power from my usb cable. It connected without problem and disconnected when I tried to use it. Maybe you have the same problem.

|improve this answer|||||
  • OP's issue is that the drive reconnects, not that it disconnects. – wjandrea May 30 '15 at 2:42

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