Logical Disk - NEC Storage Manager User Manual
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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.
Disk Array
Pool
or
Physical Disks
RANK
Multiple physical disks
are bound to form a
pool or RANK.
PD Group
00
01
02
03
10
11
12
13
70
71
72
73
Physical 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
Chapter 2 Overview of Disk Array Configuration Setting
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Logical Disks
Sam
The pool or RANK is
divided to form
logical disks.
*2
00
10
70
Disk Enclosure (DE)
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OS
Logical Disks
Physical Disks
The physical disk is
divided to form logical
disks.
Multiple physical disks are
used to form logical disks.
PD Group
01
02
03
11
12
13
71
72
73
*3
Physical Disk Number
*1
*4
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