How to Expand a Trans Metadevice (Command Line)

You can expand a master device within a trans device as long as the master is a metadevice. To expand a master that consists of a slice, you must tear down (clear) the trans, put the slice into a metadevice, then recreate the trans.

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 a master device within the trans metadevice. Refer to the metattach(1M) man page for more information.

If the master device is a mirror, you need to expand each submirror.

Example -- Expanding a Mirrored Master Device Within a Trans Metadevice

# metastat d10
d10: Trans
    State: Okay        
    Size: 102816 blocks
    Master Device: d0
    Logging Device: d1
d0: Mirror
    Submirror 0: d11
      State: Okay
...
    Submirror 1: d12
      State: Okay        
...
# metattach d11 c0t2d0s5
d11: component is attached
# metattach d12 c0t3d0s5
d12: component is attached

This example expands a trans device, d10, whose master device consists of a two-way mirror, d0, which contains two submirrors, d11 and d12. The metattach(1M) command is run on each submirror. The system confirms that each slice was attached.

Where to Go From Here

For a UFS, run the growfs(1M) command on the trans metadevice (not the master device). 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.