After uninstalling a 3rd party backup application, your tape device does NOT work. The Application event log may contain entries similar to the following:

Event 10
Event ID: 10
Date: MM/DD/YYYY
Time: HH:MM:SS
Source: Removable Storage Service
User: N/A
Computer: <ComputerName>
Description: library <LibraryName> failed to write a Free media label on media 000001L1 because RSM found a different piece of media in the library than was selected for the move to Free pool operation.

Event 119
Event ID: 119
Date: MM/DD/YYYY
Time: HH:MM:SS
Source: Removable Storage Service
User: N/A
Computer: <ComputerName>
Description: RSM could not Verify the media in drive Drive 5 of library <LibraryName> because the on-media-identifier did not match what was expected.

Event 120
Event ID: 120
Date: MM/DD/YYYY
Time:  HH:MM:SS
Source: Removable Storage Service
User: N/A
Computer: <ComputerName>
Description: RSM could not Verify the media in drive Drive 5 of library <LibraryName> because the on-media-identifier did not match what was expected.

Event 127
Event ID: 127
Date: MM/DD/YYYY
Time: HH:MM:SS
Source: Removable Storage Service
User: N/A
Computer: <ComputerName>
Description: RSM mounted medium 000001L1 in library <LibraryName> and verification of the On-Medium Id failed.

This problem occurs if the 3rd party backup application registered a media label library file with Removable Storage, and failed  to un-register the .DLL when the application was uninstalled. When RSM (Removable Storage Manager) loads, it attempts to locate all the registered media label library files. Since the uninstall removed the .DLL,file,  RSM cannot find it.

To resolve this problem:

1. Use Regedit.exe to navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\NTMS\OMID\Tape.

2. Expand the Tape sub-key.

3. Right-click your product's sub-key, like ARC for ArcServe, and press Delete.

4. Press Yes to confirm.

6. Close the Registry Editor.

7. Open a CMD.EXE window.

8. Type the following commands, pressing Enter after each:

net stop “removable storage”
net start “removable storage”

9. Close the CMD.EXE window.

NOTE: The following media label library sub-keys appear to be standard:

SUB-KEY    Description
HP HP Media Label Library
MTF MTF (Microsoft Tape Format) Media Label Library
QIC QIC (QIC113 Format) Media Label Library