How to enable flash cache for storage pool

Connect to console

$ ssh [email protected]
Warning: Permanently added '192.168.1.x' (ECDSA) to the list of known hosts.
Password:

Check the storage cache status

Welcome to the Cube Appliance
Enter "help" for a list of available commands
controller> storage
controller:storage> cache
controller:cache> status
STATUS: off

Promote a SSD disk as cache

controller:cache> promote_disk
  index          name      size   storage ids
--
      1      /dev/sdb    238.5G           0 1
      2      /dev/sdc    931.5G           2 3
--
Enter the index to promote: 1

Enable cache

controller:cache> switch
Current cache status: off
Turn on/off the cache(on/off): on

Check the result

controller:cache> status
STATUS: on
USED    SIZE
--
0.34    223GiB
--