Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 171)

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WEB BROWSER-BASED CONFIGURATION
6.7.5 Import Security Key
SED RaidSet created on an Areca RAID adapters can be migrated
to another RAID adapter. If you are importing a RaidSet originally
secured with a SED key, you need to import the foreign SED key
files to secure or unlock that RaidSet. The “Import Security Key”
file is for Raidset Roaming or Change SED Key function. If you
roam a RaidSet from old controller to another new (with Security
Functions support), the foreign SED key file must be imported
before it can be used.
1. Select the “Import/Roaming And Set SED Key” option to unlock
the locked disk and change to foreign SED key.
2. Select the “RaidSet Roaming Only” option to unlock the locked
disk and personalize to new controller’s SED key. If there is an
existing SED key on new controller, RaidSet is updated with the
new security key. If there is not an existing SED key on new
controller, RaidSet is updated to unlock RaidSet.