Multilevel storage system with hybrid data compression
AssigneeHewlett-Packard Company
InventorJohn Wilkes
Life of this patent
Estimating the term…
Abstract
A multilevel data storage system that comprises an interface, an upper-level storage device, a lower-level storage device and first and second compression state modifying engines. Data are transferred through the interface in a first compression state. Data are stored in the upper-level storage device in a second compression state that is higher than the first compression state. Data are stored in the lower-level storage device in a third compression state that is lower than the second compression state. The first compression state modifying engine is located between the interface and the upper-level storage device. The second compression state modifying engine is located between the upper-level storage device and the lower-level storage device.
Claims18
A multilevel data storage system comprising:
- an interface through which data are transferred in a first compression state;
- an upper-level storage device in which data are stored in a second compression state, the second compression state being higher than the first compression state;
- a lower-level storage device in which data are stored in a third compression state, the third compression state being lower than the second compression state;
- a first compression state modifying engine between the interface and the upper-level storage device;
- and
- a second compression state modifying engine between the upper-level storage device and the lower-level storage device.
Dependencies are inferred from the claim text.