Re: External hard drive immediately remounts after trying to shut it down

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

> it powers up, gets
> re-detected by the system, gets auto-mounted, and starts spinning once
> again.

Typically a device spins up when it gets a command from the computer
which needs spinning. E.g. when some data reading is requested.

Maybe you get an idea of the offending process by

  btrace /dev/sdd

The texts in []-brackets tell the process name.
E.g. this is caused by dd reading from disk:
    8,48   7        1     0.000000000 29579  G   N [dd]


Have a nice day :)

Thomas