PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

5.1.1 Backing up by executing sfxdump command

This section contains an example of backing up an entire GFS Local File System specified in the /etc/vfstab file shown below. Here, /dev/rmt/0 is the backup destination tape drive.

% cat /etc/vfstab

#device              device                mount   FS      fsck    mount   mount

#to mount            to fsck               point   type    pass    at boot options

...

/dev/sfdsk/gfs/dsk/vol0a00 /dev/sfdsk/gfs/rdsk/vol0a00 /mnt sfxfs 2 yes -

...

The character special file in the representative partition of the GFS Local File System is /dev/sfdsk/gfs/rdsk/vol0a00. The mount point is /mnt.

1. Set for super user.

% su

2. Unmount the GFS Local File System to be backed up, or set the system to single-user mode so that the GFS Local File System is not updated. In the following example, the GFS Local File System is unmounted.

# umount /mnt

The GFS Local File System can be backed up while the file system is mounted. However, the GFS Local File System must be set to non-updated status. If the GFS Local File System is updated during backup, the contents of the backup may be invalid.

3. Set a tape to back up the GFS Local File System.

# sfxdump 0ucf /dev/rmt/0 /dev/sfdsk/gfs/rdsk/vol0a00

  DUMP: Writing 63 Kilobyte records

  DUMP: Date of this level 0 dump: Tue May 23 11:20:14 2000

  DUMP: Date of last level 0 dump: the epoch

  DUMP: Dumping /dev/sfdsk/gfs/rdsk/vol0a00 (kaizer1:/mnt) to /dev/rmt/0. 

  DUMP: Mapping (Pass I) [regular files] 

  DUMP: Mapping (Pass II) [directories] 

  DUMP: Estimated 282 blocks (141KB). 

  DUMP: Dumping (Pass III) [directories] 

  DUMP: Dumping (Pass IV) [regular files] 

  DUMP: 250 blocks (125KB) on 1 volume at 1838 KB/sec

  DUMP: DUMP IS DONE

  DUMP: Level 0 dump on Tue May 23 11:20:14 2000

Here, each character of 0ucf in the first parameter has the following meaning:

• 0

  This is the backup level. The number 0 means a full backup. A number between 1 and 9 means an incremental backup. In this example, the file system is backed up as an incremental backup from the latest backup at a lower level than the specified backup level.

• u

  The dump record file, /etc/sfxfs_dumpdates, is updated. Specify this character for full backup or incremental backup.

• c

  The contents are backed up on tape.

• f

  The write destination is specified. Here, /dev/rmt/0 is specified as the write destination.