HP StorageWorks P9000 Cluster Extension Software Administrator Guide (TB534-96009, February 2011)

port A physical connection that allows data to pass between a host and a disk array.
primary site The data center location that owns the cluster group (quorum resource).
PSUS Pair suspended-split.
quorum In MSCS, a cluster resource that has been configured to control the cluster, maintaining essential
cluster data and recovery information. In the event of a node failure, the quorum acts as a
tie-breaker and is transferred to a surviving node to ensure that data remains consistent within
the cluster.
RAID Redundant array of independent disks.
S-VOL Secondary or remote volume. The copy volume that receives the data from the primary volume.
SCSI Small Computer Systems Interface. A standard, intelligent parallel interface for attaching peripheral
devices to computers, based on a device-independent protocol.
secondary site The data center location with the mirror copy of the quorum disk pair.
SMIT System Manager Information Tool.
SMPL Simplex.
split-brain
syndrome
A state of data corruption that can occur if a cluster is re-formed as subclusters of nodes at each
site, and each subcluster assumes authority, starting the same set of applications and modifying
the same data.
SPOCK Single Point of Connectivity Knowledge website. SPOCK is the primary portal used to obtain
detailed information about supported HP StorageWorks product configurations.
SPOF Single point of failure.
SVP Service processor. A computer built into a disk array. The SVP, used only by an HP service
representative, provides a direct interface to the disk array.
TMSCSI Target mode SCSI.
UAC User account control.
UCF User configuration file.
VCS VERITAS Cluster Server.
VM Virtual Machine.
volume On the P9000 or XP array, a volume is a uniquely identified virtual storage device composed of
a control unit (CU) component and a logical device (LDEV) component separated by a colon. For
example 00:00 and 01:00 are two uniquely identified volumes; one is identified as CU = 00
and LDEV = 00, and the other as CU = 01 and LDEV = 00; they are two unique separate virtual
storage devices within the array.
VSC Volume size customization. Also known as CVS.
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