format SSD disk

hi guys,

i tried to format a SSD disk i used for cashing while i was on ESXI5.1 however i want to format it now to use it for cashing on ESXI 5.5 but got the below error.

any suggestion how to format this using ssh?

Call "HostDatastoreSystem.RemoveDatastore" for object "ha-datastoresystem" on ESXi "10.10.10.1" failed.

Cannot remove datastore 'datastore1' because system swap is enabled on it. Correct the problem and retry the operation.