Glossary

monitoring

Process of receiving, displaying, and logging system events.

multilevel array

See dual-level array.

O

OCE

Online Capacity Expansion. The incremental expansion of an array that requires no downtime and retains all the attributes of the original array. See also reconfiguration, RAID 0, RAID 5.

offline array

Array that can no longer be accessed.

offset

Distance from the beginning of a disk to the start of a segment.

optimal

An array in its normal operational state in which all of the components are present and operating correctly is optimal. For redundant arrays, the entire array is protected.

P

parity

Form of error-checking redundancy used to protect the data in a RAID 5.

partition

See segment.

phantom object

Object that represents a component that cannot be configured by the controller management software; for example, a missing drive.

physical drive

Single drive. See also logical device.

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