Hello,
Apart from the above errors, do you get any hardware related errors in the event logs in Windows? Are there any soft or hard write errors on the device?
Also refer to the following technote that might provide you with some insight on the problem:
http://support.veritas.com/docs/255501
You might contact the hardware vendor and chek if its a hardware issue.
Revert with details if the issue persists.
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Regards.