How to Unmirror a File System (DiskSuite Tool)

Use this procedure to unmirror a file system that can be unmounted while the system is running. To unmirror root (/), /opt, /usr, or swap, or any other file system that cannot be unmounted while the system is running, refer to "How to Unmirror a File System That Cannot Be Unmounted (Command Line)".

1. Make sure you have met the prerequisites ("Prerequisites for Maintaining DiskSuite Objects"), and have read the preliminary information ("Preliminary Information for Mirrors").

2. Check that the status of at least one submirror is "OK."

   A mirror with no submirrors in the "OK" state must be repaired first.

3. Unmount the file system.

4. Double-click the Mirror object in the Objects list.

   The object appears on the canvas.

5. To delete the mirror, display the mirror's pull-down menu and choose the Delete option. Click the Really Delete button on the Confirmation dialog box that appears.

   The mirror is split into its constituent submirrors, which appear on the canvas.

6. Edit the /etc/vfstab file.

   You must change the device name for the file system. To retain access to the data, change from the mirror to one of the submirrors. (The submirror is either a stripe or concatenated metadevice.) To remove access to the data, completely remove the entry for the file system.

7. [Optional] If retain access to the data, mount the file system.

   When the file system is remounted, it is on the stripe or concatenation.

8. [Optional] To delete the submirror that is not in use, choose the Delete option from the submirror's pull-down menu.

   Be sure to choose the submirror that you will not be using.

9. [Optional] If the submirror is composed of a single slice, you can mount the file system on the slice. To do so, delete the stripe or concatenation. Then edit the /etc/vfstab file to mount the file system on the physical slice instead of the metadevice.

10. To verify that the mirror was deleted, display the Configuration Log.

11. [Optional] Select Rescan Configuration from the File menu to reflect the file system's new mount device.