Pin a Volume

NOTE: Before you pin a volume, the performance policy associated with that volume must have caching enabled.
Pin the volume.
vol --edit volume_name --cache_pinned yes
If the volume can be pinned, you will see additional capacity information for that volume. If the volume cannot be pinned, you may see a "cache capacity exceeds available capacity" message.

Pinning a volume:

vol --edit volume1 --cache_pinned yes