Quote:

hdparm --user-master u --security-set-pass NULL /dev/sdX
hdparm --user-master u --security-erase NULL /dev/sdX


That did it! Thanks.

The command returned within a couple of seconds. The data did not seem to disappear, though, not even after two minutes. I used "fdisk -l" to test for data.

But after a power cycle, the data indeed was gone.

Thanks,
Pim