How to Replace a RAID5 Slice (DiskSuite Tool)

Use this procedure to replace an errored slice in a RAID5 metadevice in which only one slice is errored.

Replacing an errored slice when multiple slices are in error may cause data to be fabricated. The integrity of the data in this instance is questionable.

1. Make sure you have met the prerequisites ("Prerequisites for Maintaining DiskSuite Objects"), and have read the overview ("Overview of Replacing and Enabling Slices in Mirrors and RAID5 Metadevices") and the preliminary information ("Preliminary Information For Replacing and Enabling Slices in Mirrors and RAID5 Metadevices").

2. Double-click the errored RAID5 metadevice in the Objects list.

   The object appears on the canvas.

3. Click Slices to open the Slice Browser.

4. Select an available slice to replace the errored slice then drag it to the slice in the RAID5 metadevice object rectangle.

   The slice must be at least as large as the smallest slice in the device.

5. Click the top rectangle of the RAID5 metadevice object then click Commit.

   During the replacement, the state of the metadevice and the new slice will be "Resyncing." You can continue to use the metadevice while it is in this state.

6. When the resync is done, verify that the status of the RAID5 object is OK.

   You might need to select Rescan Configuration from the File menu for the status to be updated.

7. Validate the data.