VERITAS Volume Manager 3.5 Migration Guide (August 2002)

Final 24 July 2002 1
VxVM and LVM
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This chapter provides an overview of the VERITAS Volume Manager (also referred to as
VxVM) and its features. A brief description of the benefits of migrating from the HP-UX
Logical Volume Manager (LVM) to VxVM, and the coexistence of VxVM disks with LVM
disks is also given.
The following topics are discussed in this chapter:
◆ Introducing the VERITAS Volume Manager
◆ VxVM and LVM—Conceptual Comparison
◆ Coexistence of VxVM and LVM Disks
Introducing the VERITAS Volume Manager
The VERITAS Volume Manager is analternative VolumeManagement productfor HP-UX
that includes mirroring features. It offers many capabilities that are not available with the
LVM and MirrorDisk/UX products today.
◆ The VERITAS Volume Manager can coexist with LVM. Users can decide which
volumes they want managed by each volume manager. For users who want to
migrate LVM volume groups to VxVM disk groups, a conversion utility is included.
This utility, vxvmconvert, is described in detail in Converting LVM to VxVM.
◆ With HP-UX 11i, the VERITAS Volume Manager is available for installation with the
HP-UX 11i ApplicationSoftware. Basic volume management capabilitiesare available
for no extra charge. Advanced capabilities, such as mirroring, RAID-5, and DMP for
active-active systems are available in a separately licensed product, B9116AA.
◆ With HP-UX 11i , the VERITAS Volume Manager is the default volume manager and
can be used instead of LVM to manage the root disk. Basic volume management
capabilities are included in the operating system. Advanced capabilities, such as
mirroring, RAID-5, and DMP for active-active systems are available in a separately
licensed product, B9116AA.