HP XP P9500 Storage - Manual (Page 128)

source volume
(S-VOL) The volume in a copy pair containing the original data. The term is used only in the earlier version
of the Remote Web Console GUI (still in use), for the following HP products: Business Copy Z,
Dataset Replication for Mainframe, IBM FlashCopy.
space Generally refers to the data storage capacity of a disk drive or flash drive.
SRM Storage Replication Manager
SSB sense byte
SSID (storage) subsystem identifier. SSIDs are used as an additional way to identify a control unit on
mainframe operating systems. Each group of 64 or 256 volumes requires one SSID, therefore
there can be one or four SSIDs per CU image. For the XP P9500, one SSID is associated with
256 volumes.
SSL secure socket layer
steady split In Business Copy, a typical pair split operation in which any remaining differential data from the
P-VOL is copied to the S-VOL and then the pair is split.
sync synchronous
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
128 Glossary