Source: http://episteme.arstechnica.com/groupee/forums/a/tpc/f/12009443/m/316003735731/r/779002935731

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Event ID: 15
Source: Removable Storage Service
RSM cannot manage library Tape0. The database is corrupt.
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This issue may occur if the Removable Storage service did not detect a valid media library. This could be caused by a transient error in the library when the service queried the removable storage device properties. The Removable Storage database can be restored by reinstalling the removable storage device and forcing Windows to rebuild the database.

To restore the database:

1. Right-click My Computer, and then click Manage.
2. In the left pane, under Computer Management (local), expand System
Tools, and then click Device Manager.
3. In the right pane, expand the device type, right-click the device, and
then click Uninstall.
4. In the left pane, expand Removable Storage, and then expand Libraries.
5. Under Libraries, right-click the device, and then click Delete.
6. In the left pane, click Device Manager.
7. In the right pane, right-click the name of the local computer (usually
the first name in the list), and then click Scan for hardware changes.
8. Restart the computer if you are prompted.

For more related information of Event ID 15, please refer to:
http://www.microsoft.com/technet/support/ee/result.aspx...CID=1033&ProdVer=5.2

Also, you may try the following steps to restore your Removable Storage
database manually:

1. In the Computer Management tool, double-click the Services and
Applications branch to expand it, and then click Services.
2. Locate and stop the "Removable Storage" service, or change the startup
type from "Automatic" to "Disabled", and then restart your computer.
3. Use Windows Explorer to view the %SystemRoot%\System32\NtmsData folder,
and rename the existing files in this folder to a .old file extension, or
copy them to a different folder.
4. Use Registry Editor to view the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\NTMS
If the ImportDatabase REG_DWORD exists, change the value of the
ImportDatabase REG_DWORD from 0 to 0x1. If it does not exist, add it with a
value of 0x1:

value name: ImportDatabase
data type: REG_DWORD
String: 1
5. In the Computer Management tool, double-click the Services and
Applications branch to expand it, and then click Services.
6. Locate the Removable Storage service, try to start the service, or
change the startup type from "Disabled" to "Automatic", and then restart
your computer. This should import the database from the export folder,
build a new index file, and be consistent from when the last %Systemroot%
backup was performed.

235032: Problems with a Damaged Removable Storage Manager Database (Should
be applied to Windows XP)
http://support.microsoft.com/kb/235032/EN-US/