HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 171

Code Disk module status
BIN n Binding -- being bound into logical disk unit (LUN). No other configuration
functions can be performed while disks are being bound.
ENA n Enabled (bound with its primary route via this SP). If disk array has another SP,
this module's box is marked RDY on that SP's display. For a hot spare, the code
is ENA H; it means that the hot spare has been integrated into RAID group
whose logical disk unit number is shown.
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