Hitachi Universal Storage Platform V Reference Manual page 36

Figure 2-3
drives controlled by one BED pair are called an "array domain." An array
domain can contain a variety of LVI and/or LU configurations. RAID-level
intermix (all RAID types) is allowed within an array domain (under a BED pair)
but not within an array group.
BED Pair
*1: A RAID group (3D+1P/2D+2D) consists of fibr e port number 0, 2, 4, and 6, or 1, 3, 5 and 7.
Figure 2-3
2-10
Hitachi Universal Storage Platform V/VM User and Reference Guide
illustrates a conceptual array domain. All functions, paths, and data
Fibr e Port Number
Fibre Port
Fibre Loop
0
1
2
BED
(CL1)
3
4
5
6
7
0
1
2
BED
(CL2)
3
4
5
6
7
RAID group (3D+1P / 2D+2D)
Conceptual Array Domain
Architecture and Components
RAID group (7D+1P / 4D+4D)
00 01
00 01
00 01
00 01
00 01
00 01
00 01
00 01
*1
Max. 64 drives per FCAL
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