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Glossary 43
redundancy
The provision of multiple, interchangeable components to perform a single
function to cope with failures and errors. A RAID set is considered to be
redundant when user data is recorded directly to one member and all of the other
members include associated parity information.
Redundant Array of Inexpensive Disks
A method of using hard disk drives in an array to provide data redundancy to
increase system reliability and performance.
reliability
The continuous integrity of a system (server, storage, network, or cluster).
resource
A software or hardware entity on which a client/server application or service is
dependent. As it pertains to Microsoft® Cluster Server, a cluster resource must
have the ability to be managed by the cluster and must reside on one of the
cluster nodes. A resource can be a member of only one group.
shared storage clustering
The cluster architecture in which clustered servers share access to a common set
of hard drives. Microsoft® Cluster Software is based on shared storage clustering
and requires all clustered (shared) data to be stored in an external storage system.
Small Computer System Interface
A standard parallel interface for rapid data transmission.
Small Form-Factor Pluggable
A device that converts electrical signals to optical signals at the point where the
fiber cables connect to the Fibre Channel elements, such as controllers or
adapters.