Contains one row for each restored filegroup. This table is stored in the msdb database.
Unique identification number that identifies the corresponding restore operation. References restorehistory(restore_history_id).
Name of the filegroup being restored. Can be NULL.
When a database is reverted to a database snapshot, this value is populated in the same way as for a full restore.
To reduce the number of rows in this table and in other backup and history tables, execute the sp_delete_backuphistory stored procedure.