Hmm....it seems it has been going on for a few days. The Event Viewer
Logs show both errors and warnings coming up.

-----------------
Event Type: Error
Event Source: Disk
Event Category: None
Event ID: 11
Date: 04/07/2005
Time: 10:27:25
User: N/A
Computer: WORK
Description:
The driver detected a controller error on \Device\Harddisk3\D.



Event Type: Warning
Event Source: Disk
Event Category: None
Event ID: 51
Date: 01/08/2005
Time: 14:26:47
User: N/A
Computer: WORK
Description:
An error was detected on device \Device\Harddisk3\D during a paging
operation.
--------------------


Warning 01/08/2005 17:33:03 disk None 51 N/A WORK
Warning 01/08/2005 17:32:22 disk None 51 N/A WORK
Warning 01/08/2005 14:27:28 disk None 51 N/A WORK
Warning 01/08/2005 14:26:47 disk None 51 N/A WORK
Error 24/07/2005 12:26:31 disk None 11 N/A WORK
Error 24/07/2005 12:26:31 disk None 11 N/A WORK
Error 24/07/2005 12:26:30 disk None 11 N/A WORK
Error 24/07/2005 12:26:30 disk None 11 N/A WORK
Error 24/07/2005 12:26:29 disk None 11 N/A WORK
Error 24/07/2005 12:26:28 disk None 11 N/A WORK
Error 21/07/2005 09:03:02 disk None 11 N/A WORK
Error 21/07/2005 09:03:02 disk None 11 N/A WORK
Error 21/07/2005 09:03:02 disk None 11 N/A WORK
Error 21/07/2005 09:03:01 disk None 11 N/A WORK
Error 21/07/2005 09:03:01 disk None 11 N/A WORK
Error 21/07/2005 08:39:02 disk None 11 N/A WORK
Error 19/07/2005 18:19:35 disk None 11 N/A WORK
Error 19/07/2005 18:19:34 disk None 11 N/A WORK
Error 19/07/2005 18:19:34 disk None 11 N/A WORK
Error 19/07/2005 18:19:34 disk None 11 N/A WORK
Error 19/07/2005 18:19:34 disk None 11 N/A WORK
Error 19/07/2005 18:19:33 disk None 11 N/A WORK
Error 17/07/2005 05:23:35 disk None 11 N/A WORK
Error 17/07/2005 05:23:35 disk None 11 N/A WORK
Error 17/07/2005 05:23:34 disk None 11 N/A WORK
Error 17/07/2005 05:23:34 disk None 11 N/A WORK
Error 17/07/2005 05:23:33 disk None 11 N/A WORK
Error 17/07/2005 05:23:21 disk None 11 N/A WORK
Error 17/07/2005 05:23:20 disk None 11 N/A WORK
Error 17/07/2005 05:23:20 disk None 11 N/A WORK
Error 17/07/2005 05:23:19 disk None 11 N/A WORK
Error 17/07/2005 05:23:19 disk None 11 N/A WORK
Error 17/07/2005 05:23:18 disk None 11 N/A WORK
Error 17/07/2005 05:23:17 disk None 11 N/A WORK
Error 12/07/2005 10:01:26 disk None 11 N/A WORK
Error 12/07/2005 10:01:26 disk None 11 N/A WORK
Error 12/07/2005 10:01:26 disk None 11 N/A WORK
Error 05/07/2005 11:06:14 disk None 11 N/A WORK
Error 05/07/2005 11:06:14 disk None 11 N/A WORK
Error 05/07/2005 11:04:00 disk None 11 N/A WORK
Error 05/07/2005 11:03:59 disk None 11 N/A WORK
Error 05/07/2005 11:03:59 disk None 11 N/A WORK
Error 04/07/2005 10:27:25 disk None 11 N/A WORK