backupfilegroup (Transact-SQL)
Applies to: 
SQL Server
Contains one row for each filegroup in a database at the time of backup. backupfilegroup is stored in the msdb database.
Note
The backupfilegroup table shows the filegroup configuration of the database, not of the backup set. To identify whether a file is included in the backup set, use the is_present column of the backupfile table.
| Column name | Data type | Description |
|---|---|---|
backup_set_id |
int | Backup set containing this filegroup. |
name |
sysname | Name of the filegroup. |
filegroup_id |
int | ID of the filegroup; unique within the database. Corresponds to data_space_id in sys.filegroups. |
filegroup_guid |
uniqueidentifier | Globally unique identifier for the filegroup. Can be NULL. |
type |
char(2) | Content type, one of:FG = Rows filegroupSL = Log filegroup |
type_desc |
nvarchar(60) | Description of function type, one of:ROWS_FILEGROUPSQL_LOG_FILEGROUP |
is_default |
bit | The default filegroup, used when no filegroup is specified in CREATE TABLE or CREATE INDEX. |
is_readonly |
bit | 1 = Filegroup is read-only. |
log_filegroup_guid |
uniqueidentifier | Can be NULL. |
Remarks
Important
The same filegroup name can appear in different databases; however, each filegroup has its own GUID. Therefore, (backup_set_id,filegroup_guid) is a unique key that identifies a filegroup in backupfilegroup.
RESTORE VERIFYONLY FROM <backup_device> WITH LOADHISTORY populates the columns of the backupmediaset table with the appropriate values from the media-set header.
To reduce the number of rows in this table and in other backup and history tables, execute the sp_delete_backuphistory stored procedure.