HP XP7 Storage - Manual (Page 236)

Description Item
LDKC number. LDKC
Control unit number. CU
The range of LDEVs that can be allocated to the SSID. Each LDEV group (divided
by LDEV boundary) has a unique SSID. LDEV Boundary
Storage system identifier in hexadecimal format. SSID
236 LDEV GUI reference