ieee1394 disk sudden input/output error


I changed my opensuse 10.2 to opensuse 11.1 on my
Dell Latitude D820 laptop.

With the new suse I have a strange problem with my
momobay cx-1 external firewire harddisk.

The disk is recognized by the system, and I can use
it, as before under 10.2.
Then suddenly and unpredictably no access is possible
anymore and I get
Input/output error
if access the disk, e.g. with ls
There may be a tendency that the problem appears during
heavier use.

Avoiding the automatic mounting and mounting with a
fixed mount point does not solve the problem.

Since the disk worked well under 10.2, I am a bit at loss
where the problem is. A Bug ?

Thanks for giving it a thought.