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Solaris Volume Manager Administration Guide

ProcedureHow to Expand a RAID-5 Volume

In general, attaching components is a short-term solution to a RAID-5 volume that is running out of space. For performance reasons, it is best to have a “pure” RAID-5 volume. If you must expand an existing RAID-5 volume to gain extra storage space, use this procedure.

Caution – Caution –

Do not create volumes larger than 1 Tbyte if you expect to run the Solaris software with a 32–bit kernel or if you expect to use a version of the Solaris OS prior to the Solaris 9 4/03 release. See Overview of Multi-Terabyte Support in Solaris Volume Manager for more information about multiterabyte volume support in Solaris Volume Manager.

Before You Begin

Read Background Information for Creating RAID-5 Volumes.

  1. Make sure that you have a current backup of all data and that you have superuser access.

  2. To attach additional components to a RAID-5 volume, use one of the following methods:

    • From the Enhanced Storage tool within the Solaris Management Console, open the Volumes node, then open the RAID-5 volume. Choose the Components pane. Then, choose Attach Component. Follow the onscreen instructions. For more information, see the online help.

    • Use the following form of the metattach command:


      # metattach volume-name name-of-component-to-add
      volume-name

      Specifies the name of the RAID-5 volume to expand.

      name-of-component-to-add

      Specifies the name of the component to attach to the RAID-5 volume.

      See the metattach(1M) man page for more information.

Example 15–3 Adding a Component to a RAID-5 Volume

The following example shows the addition of slice c2t1d0s2 to an existing RAID-5 volume, d2. 


# metattach d2 c2t1d0s2
d2: column is attached
See Also

For a UFS file system, run the growfs command on the RAID-5 volume. See Volume and Disk Space Expansion Using the growfs Command.

Some applications, such as a database, do not use a file system. These applications instead use the raw volume. In these cases, the application must have its own way of growing the added space.