Logical Volume Manager (Lvm); Figure 77 Logical Volume Manager (Lvm) - Fujitsu ETERNUS AF250 Design Manual

1. Function
Server Linkage Functions

Logical Volume Manager (LVM)

The Logical Volume Manager is a management function that groups the save areas in multiple drives and parti-
tions and manages these areas as one logical drive. Adding drives and expanding logical volumes can be per-
formed without stopping the system. This function can be used on UNIX OSs (includes Linux).
LVM has a snapshot function. This function obtains any logical volume data as a snapshot and saves the snap-
shot as a different logical volume.
To use LUNs in the ETERNUS AF to configure an LVM, the LVM can be configured by registering LUNs in the
ETERNUS AF as physical volumes.

Figure 77 Logical Volume Manager (LVM)

Business server
LVM
ETERNUS AF
Volume group
Logical volume
Physical volume Physical volume
LUN
RAID group #0 RAID group #1
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
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Physical volume
LUN LUN
RAID group #2
123
Physical group
P3AG-1822-09ENZ0