Removing a Cache or Log Device from an Existing Storage Pool (CLI)

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Use the following task to remove a read cache or log device from an existing storage pool. This capability is useful when preparing for a system update that requires the removal of certain cache devices.

Note - Meta devices cannot be removed from a storage pool.

If a pool has cache devices on both controllers of a clustered configuration, you must perform this procedure on each controller.

To add a device to a different, existing storage pool, see Adding a Cache, Meta, or Log Device to an Existing Storage Pool (CLI).

Before You Begin

Do not perform a pool configuration operation while a disk firmware upgrade is occurring. To check if an upgrade is in progress, navigate to maintenance system updates.

Go to configuration storage.
If you have multiple pools, a default pool is displayed and selected. If this is not the pool to which you want to add the device, enter set pool= and specify another online pool.
Note - If you have a single pool, the pool name is not displayed, but it is selected.
```
hostname:configuration storage (pool0)> set pool=pool1
                            pool = pool1
```

Enter show to see the device information for the pool.

hostname:configuration storage (pool1) verify> show
ID STATUS  ALLOCATION  DATA   LOG      CACHE   META     RPM
0      ok     custom      0   0          0/4    0/4    1.86T
1      ok     custom      0   0/2  34G     0      0    15000
2      ok     custom      0   0/2  34G   0/2      0    15000

Enter remove.

hostname:configuration storage (pool1)> remove

Specify the controller or disk shelf, and the number of log or cache devices to remove.
ID "0" is the controller, and the remaining IDs are the disk shelves. In the following example, 1-log=2 removes two log devices from the first disk shelf:
```
hostname:configuration storage (pool1) remove> set 1-log=2
                            1-log = 2
```
This example removes one cache device from the controller:
```
hostname:configuration storage (pool1) remove> set 0-cache=1
                            0-cache = 1
```
Enter done.
```
hostname:configuration storage (pool1) remove> done
```
Note - If the log devices use a mirrored profile, a message reminds you to select an even number of log devices to remove. If the log devices use a striped profile, you may remove an even or odd number of devices.

Removing a Cache or Log Device from an Existing Storage Pool (CLI)

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