How to Expand a Mirror (Command Line)

After checking the prerequisites ("Prerequisites for Maintaining DiskSuite Objects"), and the preliminary information ("Preliminary Information for Expanding Slices and Metadevices"), use the metattach(1M) command to attach additional slices to each submirror. Each submirror in a mirror must be expanded. Refer to the metattach(1M) man page for more information.

Example -- Expanding a Two-Way Mirror Containing a Mounted File System

# metastat
d8: Mirror
    Submirror 0: d9
      State: Okay        
    Submirror 1: d10
      State: Okay        
...
# metattach d9 c0t2d0s5
d9: component is attached
# metattach d10 c0t3d0s5
d10: component is attached

This example shows how to expand a mirrored mounted file system by concatenating two disk drives to the mirror's two submirrors. The mirror is named d8 and contains two submirrors named d9 and d10.

Where to Go From Here

For a UFS, run the growfs(1M) command on the mirror metadevice. Refer to "How to Grow a File System (Command Line)".

An application, such as a database, that uses the raw metadevice must have its own way of growing the added space.