Installation guide

8.2.6 Moving and Replacing LSM Disks in a Disk Group
When a disk is added to a disk group it is given a disk media name, such
as disk02. This name relates directly to the physical disk. LSM uses this
naming convention (described in Section 8.2.3) because it makes the disk
independent of the manner in which the volume is mapped onto physical
disks. If a physical disk is moved to a different target address or to a
different controller, the name disk02 continues to refer to it. You can
replace disks by first associating a different physical disk with the name of
the disk to be replaced, and then recovering any volume data that was
stored on the original disk (from mirrors or backup copies).
8.3 LSM System Administration
Once a disk is under the control of LSM, all system administration tasks
relating to that disk must be performed using LSM utilities and
commands. For instance, if you install a file system on an LSM-controlled
disk using physical disk paths rather than the LSM interfaces, LSM will be
unaware that the new file system exists and will reallocate its space.
LSM provides three interfaces for managing LSM disks: a command line
interface, a menu interface, and a graphical user interface. You can use any
of these interfaces (or a combination of the interfaces) to change volume
size, add plexes, and perform backups or other administrative tasks. You
can use the LSM interfaces interchangeably. LSM objects created by one
interface are fully interoperable and compatible with objects created by the
other interfaces. Table 8–3 describes these LSM interfaces.
8–10 Administering the Logical Storage Manager