VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Chapter 1, Understanding VERITAS Volume Manager

Device Discovery

name to VxVM for all of the paths over which it can be accessed. For example, the disk

device enc0_0 represents a single disk for which two different paths are known to the

operating system, such as c1t99d0 and c2t99d0.

To takeaccount offault domainswhen conﬁguringdata redundancy, youcan controlhow

mirrored volumes are laid outacross enclosures as described in “Mirroring acrossTargets,

Controllers or Enclosures” on page 175.

Example HA Conﬁguration Using Multiple Hubs/Switches to Provide Redundant-Loop Access

See “Disk Device Naming in VxVM” on page 54 and “Changing the Disk-Naming

Scheme” on page 61 for details of the standard and the enclosure-based naming schemes,

and how to switch between them.

Virtual Objects

Virtual objects in VxVM include the following:

◆ VM Disks

◆ Disk Groups

◆ Subdisks

◆ Plexes

◆ Volumes

The connection between physical objects and VxVM objects is made when you place a

physical disk under VxVM control.

c2c1

Host

Fibre Channel

Hubs/Switches

Disk Enclosures

enc0 enc1 enc2