Mirroring volumes on a VM disk


Mirroring volumes on a VM disk
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Mirroring volumes creates one or more copies of your volumes on another disk. By creating mirror copies of your volumes, you protect your volumes against loss of data if a disk fails.

You can use this task on your root disk to make a second copy of the boot information available on an alternate disk. This lets you boot your system even if your root disk fails.

Note:

This task only mirrors concatenated volumes. Volumes that are already mirrored or that contain subdisks that reside on multiple disks are ignored

To mirror volumes on a disk

Make sure that the target disk has an equal or greater amount of space as the source disk.
From the vxdiskadm main menu, select Mirror volumes on a disk .
At the prompt, enter the disk name of the disk that you wish to mirror:
```
Enter disk name [<disk>,list,q,?] mydg02
```
At the prompt, enter the target disk name (this disk must be the same size or larger than the originating disk):
```
Enter destination disk [<disk>,list,q,?] (default: any) mydg01
```

At the prompt, press Return to make the mirror:

Continue with operation? [y,n,q,?] (default: y)

The vxdiskadm program displays the status of the mirroring operation, as follows:

VxVM vxmirror INFO V-5-2-22 Mirror volume voltest-bk00
   .
   .
   . 
VxVM INFO V-5-2-674 Mirroring of disk mydg01 is complete.

At the prompt, indicate whether you want to mirror volumes on another disk (y) or return to the vxdiskadm main menu (n):
```
Mirror volumes on another disk? [y,n,q,?] (default: n)
```

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