Installation guide

8
Administering the Logical Storage
Manager
The Logical Storage Manager (LSM) software provides disk management
capabilities that increase data availability and improve disk I/O
performance. System administrators use LSM to perform disk management
functions dynamically without disrupting users or applications accessing
data on those disks.
LSM replaces the Logical Volume Manager (LVM) on Digital UNIX
systems. Refer to the Logical Storage Manager manual for information
about how to migrate from LVM to LSM.
8.1 Features and Benefits
Table 8–1 summarizes the LSM features and benefits.
Table 8–1: LSM Features and Benefits
Feature Benefit
Manages disks Frees you from the task of partitioning disks and allocating
space. However, LSM allows you to keep control over disk
partitioning and space allocation, if desired.
Allows
transparent disk
configuration
changes
Allows you to change the disk configuration without rebooting
or otherwise interrupting users. Also allows routine
administrative tasks, such as file system backup, with reduced
down time.
Stores large file
systems
Enables multiple physical disks to be combined to form a
single, larger logical volume. This capability, called
concatenation, removes limitations imposed by the actual
physical properties of individual disk sizes. It does this by
combining the storage potential of several devices.
Note that disk concatenation is available on all systems,
including those that do not have an LSM software license.
Ease of system
management
Simplifies the management of disk configurations by providing
convenient interfaces and utilities to add, move, replace, and
remove disks.
Administering the Logical Storage Manager 8–1