Glossary

The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

subdisk

In storage media managed by VVM, a set of contiguous disk blocks used for allocating disk space. A VVM disk can be divided into one or more subdisks, each one representing a specific portion of the disk. Each portion is mapped to a specific region of a physical disk.

See also plex volume

Refers to a region of contiguous space on a disk. In Storage Foundation for Windows, subdisks are the basic units in which disk space in a volume is allocated. A disk can be divided into one or more subdisks. Each subdisk represents a specific portion of the volumes on a dynamic disk.

A Storage Foundation for Windows disk may contain multiple subdisks, but subdisks cannot overlap or share the same portions of a disk. Any disk space that is not part of a subdisk is considered to be unallocated space, which can be used to create new volumes.

Subdisks can be moved to improve disk performance.

A consecutive set of contiguous disk blocks that form a logical disk segment. Subdisks can be associated with plexes to form volumes.

A set of contiguous disk blocks that form a logical disk segment. Subdisks are associated with plexes (mirrors) to form volumes.

Refers to a region of contiguous space on a disk. Subdisks are the basic units in which Veritas Storage Foundation for Windows allocates disk space in a volume. A SFW disk can be divided into one or more subdisks. Each subdisk represents a specific portion of the volumes on a dynamic disk.

A SFW disk may contain multiple subdisks, but subdisks cannot overlap or share the same portions of a SFW disk. Any SFW disk space that is not part of a subdisk is considered to be unallocated space, which can be used to create new volumes.

You can move subdisks to improve disk performance.