Remounting external HD
 

How do I remount a external HD (WD 1.5T)?
It mounted correctly first time - I wanted to format it using GParted, but GParted gave me an error message. Now my Kubuntu 11.04 simply doesn't see the drive anymore. BTW, GParted (iso, run from the CD) doesn't see the drive either.
TIA for helping!

How did you mount it the first time?
Did it auto-mount?
Doesn't help to tell use there was an error in GParted without telling us what the error was.
What's on the external drive?

I'd recommend monitoring the kernel messages with "sudo tail -f /var/log/messages" and then inserting the USB plug. See if the drive and partitions are detected. If you failed on gparted, you may not have valid partitions, much less a valid filesystem on the drive. But look at the kernel messages. I/O errors could indicate a hardware problem, which caused the errors you saw when using gparted.

Also run "fdisk" and print out the partition table, if it exists. Use "sudo file -s <device>" and see if a filesystem exists on the partitions.

To answer the questions first:
It automounted first time around, but I wanted to get rid of the NTFS system.
You are right, I should have written down the error messages, will do that next time.

But:
I've got it up and running.
Apparently, the combination of
sudo mkdir /media/external

sudo lsusb

sudo cd media/external/

made it visible in Storage Device Manager

In the media/external directory it was visible as a (imagine: 1.4TiB !) floppy.

This time around, it showed up in GParted and formatting went OK.

After that, taking control of the thing with

sudo chown -R paul.paul /media/90d3ecb5-ba.............
did the trick. So now, I can move data to it.

Looks like problem solved.

Paul