My computer appears to be operating normally but I am concerned about multiple yellow warning messages and red error messages in Event Viewer that have been showing over the past week as follows:

The driver detected a controller error on \Device\Harddisk2\D.

Event ID 11
File Name IoLogMsg.dll
File Version 5.1.2600.0

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An error was detected on device \Device\Harddisk2\D during a paging operation.

Event ID 51
File Name IoLogMsg.dll
File Version 5.1.2600.0

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I have run WD Diagnostics on Hard Drive 2 and it pass both to Quick Test and the long (6 hour} Extended Test.

What is the problem and how can I rectify ????????