Hotfix: Operation on device '' exceeded retry count

FIX: Error message when you use the UNLOAD and REWIND options to back up a database to a tape device in SQL Server 2005: "Operation on device '' exceeded retry count"

SYMPTOMS
In Microsoft SQL Server 2005 Service Pack 2 (SP2), you use the UNLOAD and REWIND options to back up a database to a tape device. However, you receive an error message that resembles the following:
Operation on device 'TAPE0(<\\.\Tape0>)' exceeded retry count.

RESOLUTION
The fix for this issue was first released in Cumulative Update 3. For more information about how to obtain this cumulative update package for SQL Server 2005 Service Pack 2, click the following article number to view the article in the Microsoft Knowledge Base:
939537 (http://support.microsoft.com/kb/939537/LN/ ) Cumulative update package 3 for SQL Server 2005 Service Pack 2

Get more details here: http://support.microsoft.com/kb/940379/en-US