Veritas Storage Foundation Intelligent Storage Provisioning 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

■ Performance properties
You can use disk tags to create storage attributes in addition to those that are
intrinsically associated with the disk hardware, and which are automatically
discovered or assigned by VxVM. Disk tags are administered by using the vxdisk
command or the VEA graphical user interface.
For example, the following vxdisk settag command can be used to assign tags
and optional values to each disk:
# vxdisk -g mydg settag Room=room1 mydg01 mydg02 mydg03 mydg04
# vxdisk -g mydg settag Room=room2 mydg05 mydg06 mydg07 mydg08
This sets the attribute tag Room on the disks (mydg01 through mydg08) with values
that represent the physical location (room1 or room2).
Attributes may be used to capture information about the following special features
of storage:
■ Hardware-supported cloning, such as EMC Business Continuity Volumes (BCV)
■ Hardware-supported replication, such as the EMC Symmetrix Remote Data
Facility (SRDF)
■ Hardware redundancy, such as mirrored parity, and caching
It should only be necessary to enter such information manually if VxVM cannot
discover it automatically. An example of a user-defined attribute is physical
location.
Attribute names and their string values are case sensitive. You can use the vxdisk
listtag command or the VEA graphical user interface to discover the correct
spelling of LUN attribute names.
About storage pools
A storage pool is defined within a disk group in VxVM for use by ISP. A storage
pool is a policy-based container for LUNs and volumes. This means that the
templates, capabilities and policies that are associated with a storage pool define
how storage is organized within the pool.
The following types of storage pools are defined:
■ Data pools
■ Clone pools
For convenience, storage pool definitions are provided that include a number of
associated templates that can be used for different purposes.
See “Storage pool” on page 202.
35Understanding ISP
About ISP concepts