HP XP Command View Advanced Edition Software - Manual (Page 15)

Overview of Command View XP Advanced Edition Device Manager 15
• Continuous Access XP: The Continuous Access XP feature enables the user to make backup copies of
volumes in a different storage subsystem. For details, refer to the Continuous Access XP manual.
• Continuous Access XP Journal: The Continuous Access XP Journal feature enables the user to
asynchronously make backup copies of volumes between different storage subsystems. This feature
provides the source and destination storage subsystems with LDEVs, called journal volumes, which store
the updates as journal data. For details about Continuous Access XP Journal, refer to the Continuous
Access XP Journal manual.
• Copy pair: A Continuous Access XP copy pair consists of one P-VOL and one S-VOL in different storage
subsystems. A Snapshot XP copy pair (StorageWorks XP12000/XP10000 only) consists of one P-VOL
and up to 64 V-VOLs. A Business Copy XP copy pair (layer 1) consists of one P-VOL and up to three S-
VOLs in the same storage subsystem. A layer-2 Business Copy XP cascade copy pair has one SP-VOL
and up to two S-VOLs in the same storage subsystem.
• Discrete/normal VDEV: Discrete VDEV configuration (StorageWorks XP1024/XP128 RAID5 7D+1P only)
involves using two parity groups (PGs) to create a virtual device (VDEV) (array group in Device
Manager). A normal VDEV is created on a single parity group.
• Disk/Cache Partition: Disk/Cache Partition provides the cache logical partition and storage logical
partition functions (for StorageWorks XP12000/XP10000). For details on these functions, see section
2-3-
1 .
• Host: A user-defined set of worldwide names (WWNs) which represent a physical host server with one or
more fibre-channel host bus adapters (HBAs), each of which may have one or two ports with unique
WWNs.
• Hosts object: A display of the user-defined hosts in Device Manager and the detailed storage information
for each host, including allocated capacity and storage groups in use. For each host server, the Hosts
object displays information about storage allocated to the host.
• Host storage domain: An existing host group on a StorageWorks XP12000/XP10000 or StorageWorks
XP1024/XP128 storage subsystem that is configured using the LUN Manager software for the storage
subsystem. Device Manager displays the host storage domain information for the StorageWorks
XP12000/XP10000 and StorageWorks XP1024/XP128 storage subsystems and allows the user to
change host storage domain names.
• LDEV: A logical device on a storage subsystem. An unallocated LDEV is not mapped to a LUN (no
access path). An allocated LDEV has one or more access paths (LUNs).
• Logical group: A user-defined group for managing storage. A logical group can contain logical groups and
storage groups. You can add storage to an empty logical group but not to a logical group that contains a
subordinate logical group or storage group. Logical groups are displayed under the Logical Groups
object.
• Logical groups object: A display of the user-defined logical groups in Device Manager. The logical groups
object can be expanded to display the logical groups. The user-defined storage groups are displayed at
the end of the logical groups, along with information about the storage allocated to the storage groups.
The logical groups object can be structured as desired by the user (e.g., by platform, organizational
department, etc.) with logical groups in a hierarchical configuration.
• LU/volume: A logical unit (LU) on a storage subsystem. In most cases an LU, or volume, is the same as
an LDEV. An exception is a LUN Expansion (LUSE) device.
• LUN group: A LUN security group on a StorageWorks XP512/XP48 storage subsystem. Device Manager
allows the user to manage LUN groups.
• LUSE: An LU consisting of multiple LDEVs. You can create a LUSE device on a StorageWorks XP Disk
Array storage subsystem.
• Port: CHA/port controller port where the cable from storage subsystem is connected.
• Primary volume (P-VOL): The source volume that is being copied to another volume by Business Copy
XP, Snapshot XP, Continuous Access XP, or Continuous Access XP Journal.
• RAID Manager: The licensed software product that enables the user to perform Continuous Access XP
and/or Business Copy XP operations by issuing commands from the host to the command device on the
storage subsystem. For details about RAID Manager, refer to the RAID Manager manuals.
• Secondary volume (S-VOL): The target volume onto which a P-VOL is being copied by Business Copy
XP, Snapshot XP, Continuous Access XP, or Continuous Access XP Journal.
• Secondary-primary volume (SP-VOL): A Business Copy XP volume that is an S-VOL in the top layer and
a P-VOL in the second layer. When you use the Business Copy XP cascade function (for StorageWorks
XP Disk Array), you can create a copy pair (in the second layer) whose P-VOL is an S-VOL of another
copy pair (in the top layer).