HP XP P9000 Continuous Access Synchronous for Mainframe Systems User Guide

system option
mode (SOM)
Additional operational parameters for the RAID storage systems that enable the storage system
to be tailored to unique customer operating requirements. SOMs are set on the service processor.
V version; variable length and de-blocking (mainframe record format)
V-VOL virtual volume
V-VOL
management area
Contains the pool management block and pool association information for Snapshot operations.
The V-VOL management area is created automatically when additional shared memory is installed
and is required for Snapshot operations.
VB variable length and blocking (mainframe record format)
view mode The mode of operation of Remote Web Console that allows viewing only of the storage system
configuration. The two Remote Web Console modes are view mode and modify mode.
virtual device
(VDEV)
A group of logical devices (LDEVs) in a RAID group. A VDEV typically consists of some fixed
volumes (FVs) and some free space. The number of fixed volumes is determined by the RAID level
and device emulation type.
virtual volume
(V-VOL)
The secondary volume in a Fast Snap or Snapshot pair. When in PAIR status, the V-VOL is an
up-to-date virtual copy of the primary volume P-VOL When in SPLIT status, the V-VOL points to
data in the P-VOL and to replaced data in the pool, maintaining the point-in-time copy of the
P-VOL at the time of the split operation.
VM volume migration; volume manager
VOL, vol volume
VOLID volume ID
volser volume serial number
volume A logical device (LDEV), or a set of concatenated LDEVs in the case of LUSE, that has been defined
to one or more hosts as a single data storage unit. A mainframe volume is called a logical volume
image (LVI), and an open-systems volume is called a logical unit. (LU).
volume pair See copy pair.
WAN wide-area network
WC Web Console
WDM wavelength division multiplexing
Web Console The computer inside a RAID storage system that hosts the Remote Web Console software and is
used by service personnel for configuration and maintenance of the storage system.
WR write
write order The order of write I/Os to the primary volume of a copy pair. The data on the S-VOL is updated
in the same order as on the P-VOL, particularly when there are multiple write operations in one
update cycle. This feature maintains data consistency at the secondary volume. Update records
are sorted in the cache at the remote system to ensure proper write sequencing.
WS workstation
WWN worldwide name
WWPN worldwide port name
XRC IBM Extended Remote Copy
184 Glossary