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Chapter 2 Overview of Disk Array Configuration Setting
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The logical disks in the disk array are equivalent to the physical disk when viewed from the OS. In
the OS, this physical disk is partitioned to be managed as multiple logical disks. In the disk array,
multiple physical disks are bound as a pool or RANK, which is then divided to form logical disks.
*1 When the OS is used to support the volume group and the software RAID, etc.
*2 The PD group refers to a management aggregate of physical disks consisting of one or more DEs.
*3 The Disk Enclosure (DE) refers to a management aggregate of 10 to 15 physical disks.
*4 The physical disk number and the RANK number are given in terms of each PD group.
Figure 2-6 Physical Disks and Logical Disks
Disk Arra
y
OS
Physical Disks
Pool
or
RANK
Logical Disks
Ph
y
sical Disks
Lo
g
ical Disks
Multiple physical disks
are bound to form a
pool or RANK.
The pool or RANK is
divided to form
logical disks.
Sam
PD Grou
p
*2
PD Grou
p
Disk Enclosure
(
DE
)
*3
Physical Disks
00
01
02
03
10
11
12
13
70
71
72
73
00
01
02
03
10
11
12
13
70
71
72
73
Ph
y
sical Disk Number
*4
The physical disk is
divided to form logical
disks.
Multiple physical disks are
used to form logical disks.
*1