Extending an LVM rootvg when dmp_native


Extending an LVM rootvg when dmp_native_support is on
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Extending an LVM rootvg when dmp_native_support is on

If dmp_native_support is on, and an LVM root volume group (rootvg) is enabled for DMP, you can add DMP devices online to the rootvg, without rebooting the system.

To add a DMP device to a DMP-enabled rootvg

List the available physical volumes. The output includes the DMP devices that are available to LVM. For example:

# lsdev -c disk
...
ibm_ds8x000_0100   Available      Veritas DMP Device
ibm_ds8x000_017d   Available      Veritas DMP Device
emc0_00a5          Available      Veritas DMP Device
emc0_00a7          Available      Veritas DMP Device

List the paths that are configured to be managed by DMP as a result of enabling DMP support for the volume group. You can optionally specify the volume group name using the vgname parameter.
```
# vxdmpadm native list
NAME       DMPNODENAME
====================================
hdisk21    ibm_ds8x000_0100
hdisk22    ibm_ds8x000_0100
```

List the volume groups:

# lspv
hdisk1     00f617b700039215   None
hdisk24				00f617b700039215   None
hdisk21    00f617b7ae6f71b3   rootvg   active
hdisk22    00f617b7ae6f71b3   rootvg   active

Extend the DMP-enabled rootvg to an additional DMP device. For example:
```
# extendvg rootvg ibm_ds8x000_017d
```

Verify the subpaths of the DMP device.

# vxdmpadm native list
NAME       DMPNODENAME
====================================
hdisk21    ibm_ds8x000_0100
hdisk22    ibm_ds8x000_0100
hdisk1     ibm_ds8x000_017d
hdisk24    ibm_ds8x000_017d

Release the paths to the operating system.
```
# vxdmpadm native release
```

Verify that the DMP device is added to the rootvg. For example:

# lsvg -p rootvg
rootvg:
PV_NAME    PV STATE   TOTAL PPs   FREE PPs   FREE DISTRIBUTION
hdisk21    active     73          0          00..00..00..00..00
hdisk1     active     15          15         03..03..03..03..03

Verify that the subpaths of the DMP device are added to the rootvg.

# lspv | grep -w rootvg
hdisk1     00f617b700039215   rootvg   active
hdisk21    00f617b7ae6f71b3   rootvg   active
hdisk22    00f617b7ae6f71b3   rootvg   active
hdisk24    00f617b700039215   rootvg   active