Unmirroring the root volume group

You can unmirror the root volume group.

Attention: Unmirroring the root volume group requires advanced system administration experience. If not done correctly, your system can become unbootable.

In the following scenario, the root volume group is on hdisk01 and mirrored onto hdisk11. This example removes the mirror on hdisk11. The procedure is the same, regardless of which disk you booted to last.

Use the following command to unmirror the root volume group on hdisk11:
```
unmirrorvg rootvg hdisk11
```
The unmirrorvg command turns quorum back on for the root volume group.
Use the following command to reduce the disk out of the root volume group:
```
reducevg rootvg hdisk11
```
Use the following command to reinitialize the boot record of the remaining disk:
```
bosboot -a -d /dev/hdisk01
```
Use the following command to modify the boot list in order to remove the unmirrored disk from the list:
```
bootlist -m normal hdisk01
```

The disk is unmirrored.