HP StorageWorks P9000 Cluster Extension Software Installation Guide (TB534-96008, February 2011)

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.
RHCS Red Hat Cluster Suite
rolling disaster A rolling disaster is a catastrophic event or outage that affects the data stored on remote mirrored
disk pairs. In a rolling disaster, data stored on remote mirrored disk pairs can be entirely lost
during a recovery attempt.
RPM Red Hat package manager.
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.
SDK Software Developer Kit.
secondary site The data center location with the mirror copy of the quorum disk pair.
SLE HA SUSE Linux Enterprise High Availability Extension
SMIT System Manager Information Tool.
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.
SUM Software Update Manager.
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.
UCF User configuration file.
VCS VERITAS Cluster Server.
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.
VxVM Veritas Volume Manager.
WMI service The Windows Management Instrumentation service.
30 Glossary