A system for backing up and restoring information includes at least one
storage device, a primary server for granting and denying a global lock
to devices requesting access to the at least one storage device and at
least one secondary server including internal tables for storing
information relating to storage in the at least one storage device, the
at least one secondary server requesting a global lock from the primary
server, wherein after the global lock is granted by the primary server,
the at least one secondary server checks its own internal tables to
determine whether access to the at least one storage device can be
granted.