Create a custom thin pool

Table of contents

You can create custom thin pools to have a better control over the storage.

Before you begin

Display available volume groups:
```
# vgs -o vg_name
```
```
  VG
  VolumeGroupName
```
List available devices:
```
# lsblk
```
Create a LV to hold the thin pool data:
```
# lvcreate --name ThinPoolDataName --size Size VolumeGroupName /DevicePath
```
Replace ThinPoolDataName with the name for your thin pool data LV. Replace Size with the size for your LV. Replace VolumeGroupName with the name of your volume group. Replace /DevicePath with your device path.

Create a LV to hold the thin pool metadata:

# lvcreate --name ThinPoolMetadataName --size Size VolumeGroupName /DevicePath

Combine the LVs into a thin pool:

# lvconvert --type thin-pool --poolmetadata ThinPoolMetadataName VolumeGroupName/ThinPoolDataName

Verify that the custom thin pool is created:

# lvs -o lv_name,seg_type

  LV                Type
  ThinPoolDataName  thin-pool

Uncache a logical volume

Extend a thin pool