VERITAS Volume Manager 3.1 Administrator's Guide

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term device name can also be
used to refer to the disk access
name.
disk access records
Configuration records used to
specify the access path to
particular disks. Each disk access
record contains a name, a type,
and possibly some type-specific
information, which is used by the
Volume Manager in deciding how
to access and manipulate the disk
that is defined by the disk access
record.
disk array A collection of disks
logically arranged into an object.
Arrays tend to provide benefits
such as redundancy or improved
performance.
disk array serial number This
is the serial number of the disk
array. It is usually printed on the
disk array cabinet or can be
obtained by issuing a vendor
specific SCSI command to the
disks on the disk array. This
number is used by the DMP
subsystem to uniquely identify a
disk array.
disk controller The controller
(HBA) connected to the host or the
disk array that
is represented as the parent node
of the disk by the Operating
System, is called
the disk controller by the
multipathing subsystem of Volume
Manager.
For example, if a disk is
represented by the device name:
/devices/sbus@1f,0/QLGC,is
p@2,10000/sd@8,0:c
then the disk controller for the
disk sd@8,0:c is:
QLGC,isp@2,10000
This controller (HBA) is connected
to the host.
disk group A collection of disks
that share a common
configuration. A disk group
configuration is a set of records
containing detailed information on
existing Volume Manager objects
(such as disk and volume
attributes) and their relationships.
Each disk group has an
administrator-assigned name and
an internally defined unique ID.
The root disk group (rootdg) is a
special private disk group that
always exists.