Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Table 27-1
A conceptual comparison of LVM and VxVM (continued)
DescriptionVxVM termLVM term
An LVM logical volume and a VxVM
volume are conceptually the same.
Both are virtual disk devices that
appear to applications, databases, and
file systems like physical disk devices,
but do not have the physical
limitations of physical disk devices.
Due to its virtual nature, a volume
(LVM or VxVM) is not restricted to a
particular disk or a specific area of a
disk.
An LVM volume is composed of fixed
length extents. LVM volumes can be
mirrored or striped, but
mirrored-stripe and striped-mirror
layouts are not supported.
VxVM volumes consist of one or more
plexes/mirrors holding a copy of the
data in the volume. The plexes or
mirrors, in turn, are made up of
subdisks with arbitrary length. The
configuration of a volume can be
changed by using the VxVM user
interfaces. See the Veritas Volume
Manager Administrator’s Guide for
more information. VxVM volumes can
be concatenated, mirrored, striped,
RAID-5 or combinations such as
mirrored-stripe, striped-mirror, and
concatenated-mirror.
VolumeLogical volume
Offline data migration
About VxVM and LVM
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