Chapter 1 Storage Overview

I-19
Dynamic pool
The dynamic pool is a virtual medium, which manages the space on the pool using a virtual
storage space.
Like block management in a file system, the dynamic pool manages used space and unused
space. When making up logical disks, separate unused space from the pool according to the
required capacity, then assign the physical disk space corresponding to the logical disk space.
The dynamic pool moderates the limit on the number of constituent physical disks and enables
flexible configurations. In addition, the dynamic pool allows to use additional features such as
pool capacity expansion and logical disk capacity expansion. For details on the dynamic pool,
refer to 2.1.2 “Dynamic Pool”.
For the practical configurations of physical disks on a dynamic pool, refer to C.3 “List of
Pool-Configurable RAID Types”.
Figure 1-14 Logical Configurations of Disk Arrays (Pool)
Lo
g
ical Disk Confi
g
uration of Basic Pool
Logical Disk Configuration of Dynamic Pool
PD00 PD01 PD02 PD03 PD04
LD00
LD01
LD02
LD03
PD00 PD01 PD02 PD03 PD04
LD00
LD01
LD02
LD03
Logical Disk Configuration of Basic Pool (Striping)
PD00 PD01 PD02 PD03 PD04
LD00
LD01
LD02
LD03
... PDnn
...
Basic Pool
Basic Pool
Dynamic Pool