external harddisk problem

[koenh]

Hello,

I have an external harddisk, formatted in NTFS.
I never had problems, until i formatted my laptop to Kubuntu 12.04.
the mounting is successful, but disappears after a while. I can copy some files without problems, but multiple directories always fail.

Does anyone has an idea what can cause the problem?

tx.

[sam81]

are you sure the disk is healthy? you could install the gnome-disk-utility to check what S.M.A.R.T. reports
sudo apt-get install gnome-disk-utility

to run it call
/usr/bin/palimpsest

[Guest]

I would have a look at /var/log/syslog and look at the time stamp around when the drive disappears. If you know what it is referenced as (say /dev/sdb or the like) then you could do something like cat /var/log/syslog | grep /dev/sdb to see the activity for that device.

[koenh]

tx,

I connected it to a windows machine, and did a checkdisk. This was ok.
I also notice that when i move folders to, i have a problem.
When i copy them first and than i delete them, it's better...

so i now have no problem...
I'll look later for the outputs.
gr