On Saturday 08 December 2018 02:37:33 pm Kate Draven wrote:
> > Hi Guys,
> >
> > Probably nothing to do with this problem, but anyway:
> >
> > If I have a HDD connected via a USB adaptor, I've found that after an
> > initial plugging and use, then safely removing it, going back to it,
> > in the same session, it may or may not be recognised.  Doing a hard
> > reboot seems to clear what ever causes this.  Simply logging out and
> > logging back in doesn't seem to work.
> > --
> > Best Regards:
> >             Baron
> > ---------------------------------------------------------------------
>
> I've seen this before. Sometimes it just helps to plug out the unit out and
> do the following.
>
> If you can, power it down, then connect it, power it back up.
> If it works, it's like the unit. If it doesn't, then it's software.
>
> Another thing  you can try is to wait for a few mins, until the drive spins
> up, plug it out, wait 10s plug in again.
>
> It could be the drive is really slow to spin up.

Using the same computer and the same two devices...

When I had TDE on CentOS6, it would auto-mount from USB once per device and 
then need a full reboot before that device could be mounted again, no matter 
what method I tried (which included all of Kate's).

On Ubuntu 14.04 I can auto-mount as many times as I like as long as I make 
sure to right click on the device's desktop icon and select unmount before 
unplugging the cable.  By auto-mount I mean you have to wait for the pop-up 
and select 'Open in [Konqueror?]'.  If the pop-up doesn't pop-up, check the 
task bar, it's usually there flashing.  The other two pop-up options don't 
work so well.

On openSUSE (before I tried CentOS) I also had issues, not as bad as CentOS, 
but too long ago to remember specifics. 

Long story short, it's most likely the OS, not TDE, but keep trying different 
scenarios until you find one reliable for your box.

Best,
Michael