HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 172

Code Disk module status
EQZ n Hot spare only. Data is being copied from the hot spare onto a replacement disk
module in the logical disk unit whose number is shown.
FMT n Being hardware formatted. Generally, modules do not need hardware formatting.
OFF Powered off by the SP, which can happen if the wrong type of module is
inserted; a message also appears in the Unsolicited Event Log.
POW n Powering up.
RDY n Ready (bound with its secondary route via this SP). The other SP is the primary
route to this disk module. On the other SP's display, this module's box shows
status ENA. For a hot spare code is RDY H and means that the hot spare is in
normal standby mode, ready for service if a module in a RAID group fails.
REB n Rebuild is in progress.
UNB ** Unbound; ready to be bound into logical disk unit.
blank No disk module or a non-operational disk module in compartment (slot).
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