HP XP Array Manager Software - Manual (Page 69)

Glossary Glossary-1
Hitachi Cache Manager User’s Guide
Glossary
This glossary defines some of the special terms used in this document.
bound heads Read and write counts from cache.
cache extents Areas used for Cache Residency or Cache Manager.
Cache Residency
Manager Other names for this product are: FlashAccess, Dynamic Cache
Residency (DCR).
cache status:
cache off error Cache failed to stop.
disabled Cache is offline.
disconnected Cache is disabled for maintenance.
enabled Status is normal.
cache error Cache error occurred, so cache function has been stopped.
initializing cache status is being changed to “enabled”.
destaged heads Number of tracks written to disk asynchronously.
extent count Number of cache or dataset extents.
Extent Relation:
ALL The extent range for dataset statistics information is equal to
the extent range managed by the VTOC. The object dataset has
one extent.
ALL- The extent range for dataset statistics information is smaller
than the extent range managed by the VTOC. The object
dataset has one extent.
ALL+ The extent range for dataset statistics information is larger than
the extent range managed by the VTOC. The object dataset has
one extent.
PART The extent range for dataset statistics information is equal to
the extent range for the dataset. The object dataset has more
than one extent.
PART+ The extent range for dataset statistics information is larger than
the extent range for the dataset. The object dataset has more
than one extent.
PART- The extent range for dataset statistics information is smaller
than the extent range for the dataset. The object dataset has
more than one extent.