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518 Configuring Veritas Volume Manager
Controlling VxVM’s view of multipathed devices
subdisks to determine whether they should be relocated to more suitable
disks to regain the original performance benefits.
■ Although it is possible to build Veritas Volume Manager objects on spare
disks (using vxmake or the VEA interface), it is recommended that you use
spare disks for hot-relocation only.
See “Administering hot-relocation” on page 379 for more information.
Accessing volume devices
As soon as a volume has been created and initialized, it is available for use as a
virtual disk partition by the operating system for the creation of a file system, or
by application programs such as relational databases and other data
management software.
Creating a volume in a disk group sets up block and character (raw) device files
that can be used to access the volume:
/dev/vx/dsk/diskgroup/volume block device file for volume
/dev/vx/rdsk/diskgroup/volume character device file for volume
The pathnames include a directory named for the disk group. Use the
appropriate device node to create, mount and repair file systems, and to lay out
databases that require raw partitions.
Controlling VxVM’s view of multipathed devices
To control how a device is treated by the Dynamic Multipathing (DMP) feature of
VxVM, use the
vxdiskadm command as described in “Disabling and enabling
multipathing for specific devices” on page 133.
Configuring cluster support
The Veritas Volume Manager software includes an optional cluster feature that
enables it to be used in a cluster environment. The cluster functionality in
Veritas Volume Manager allows multiple hosts to simultaneously access and
manage a set of disks under Veritas Volume Manager control. A cluster is a set of
hosts sharing a set of disks; each host is referred to as a node in the cluster.
Note: The Veritas Volume Manager cluster feature requires a license, which can
be obtained from your Customer Support channel.
For information about enabling cluster functionality in Veritas Volume
Manager, refer to the Veritas Storage Solutions Getting Started Guide.