HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 244

Status field values Description
Bin binding
Fmt formatting
Eqz equalizing (with a hot spare)
Uns unsupported
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Status field values Description
blank disk is unbound
R-1 disk is bound to a RAID-1 LUN
R-3 disk is bound to a RAID-3 LUN
R-5 disk is bound to a RAID-5 LUN
R-10 disk is bound to a RAID-1/0 LUN
Hot disk is bound to a hot spare LUN
A0, B2, etc. LUN ownership and LUN number
7-43