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extent
1. A set of consecutively addressed blocks that is allocated to a single file.
2. A set of consecutively located tracks on a CKD disk that is allocated to a single file.
3. A set of consecutively addressed blocks that is part of a single virtual disk.
A single storage device may be organized into multiple extents of different sizes, and may have multiple (possibly) non-adjacent extents that are part of the same virtual disk-to-member disk array mapping. This type of extent is sometimes called a logical disk.
Context Categories:
Storage System