How to Create a Mirror From Unused Slices (DiskSuite Tool)

The high-level steps in this procedure are:

• Creating two striped metadevices or concatenated metadevices, which will be the submirrors. Refer to "How to Create a Striped Metadevice (DiskSuite Tool)" or "How to Create a Concatenation (DiskSuite Tool)".

• Creating a one-way mirror from one of the submirrors.

• Creating the two-way mirror from the second submirror.

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

2. Click the Mirror template.

   An unassigned and uncommitted Mirror object appears on the canvas. The metadevice name is automatically assigned.

3. [Optional] Change the default metadevice name.

   Display the object's pop-up menu and select Info. Type the new metadevice name in the Device Name field and click Attach. Then click Close.

4. To create a one-way mirror, drag the first Concat/Stripe object (submirror) from the Objects list into the Mirror template. Click the top rectangle of the mirror, then click Commit.

5. To create a two-way mirror, drag the second Concat/Stripe object (submirror) from the Objects list into the Mirror. Click the top rectangle of the mirror then click Commit.

   A resync of the second submirror begins. The Mirror object displays the resync progress.

6. To verify that the mirror was committed, display the Configuration Log.

Example -- Committed Mirror Object

This example shows a committed mirror object, d5, consisting of two striped metadevices (submirrors), d3 and d4.

Where to Go From Here

To prepare the newly created mirror for a file system, refer to "How to Create a File System on a Metadevice (File System Manager)". An application, such as a database, that uses the raw metadevice must have its own way of recognizing the metadevice.