HP XP P9500 Storage - Manual (Page 142)

MB megabyte
MB/sec, MBps megabytes per second
Mb/sec, Mbps megabits per second
MCU See main control unit (MCU).
MF, M/F mainframe
MIH missing interrupt handler
modify mode The mode of operation of Remote Web Console that allows changes to the storage system
configuration. See also view mode.
MP microprocessor
MSCS Microsoft Cluster Server
multi-pathing A performance and fault-tolerant technique that uses more than one physical connection between
the storage system and host system. Also called multipath I/O.
NUM number
NVS nonvolatile storage
OPEN- x A logical unit (LU) of fixed size (for example, OPEN-3 or OPEN-9) that is used primarily for
sharing data between mainframe and open-systems hosts using Data Exchange.
OS operating system
OS/390 Operating System/390
P-site primary site
P-VOL See primary volume.
pair Two logical volumes in a replication relationship in which one volume contains original data to
be copied and the other volume contains the copy of the original data. The copy operations can
be synchronous or asynchronous, and the pair volumes can be located in the same storage system
(in-system replication) or in different storage systems (remote replication).
pair status Indicates the condition of a copy pair. A pair must have a specific status for specific operations.
When an operation completes, the status of the pair changes to the new status.
parity group See RAID group.
path failover The ability of a host to switch from using the primary path to a logical volume to the secondary
path to the volume when the primary path fails. Path failover ensures continuous host access to
the volume in the event the primary path fails.
See also alternate path and failback.
PG parity group. See RAID group.
physical device See device.
PiT point-in-time
point-in-time (PiT)
copy A copy or snapshot of a volume or set of volumes at a specific point in time. A point-in-time copy
can be used for backup or mirroring application to run concurrently with the system.
pool A set of volumes that are reserved for storing Snapshot data or Thin Provisioning write data.
pool volume
(pool-VOL) A logical volume that is reserved for storing snapshot data for Snapshot operations or write data
for Thin Provisioning.
port block A group of four fibre-channel ports that have the same port mode.
PPRC Peer-to-Peer Remote Copy
Preview list The list of requested operations on Remote Web Console.
primary site The physical location of the storage system that contains the original data to be replicated and
that is connected to one or more storage systems at the remote or secondary site via remote copy
connections. A primary site can also be called a “main site” or “local site”.
The term “primary site” is also used for host failover operations. In that case, the primary site is
the host computer where the production applications are running, and the secondary site is where
142 Glossary