Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1995-02-10
1997-09-09
Swann, Tod R.
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
39518204, G06F 1216
Patent
active
056665121
ABSTRACT:
A disk array data storage system has a plurality of storage disks and a disk array controller for coordinating transfer of user data to and from the storage disks. A memory manager is provided to manage memory allocation and data storage on the disk array. The memory manager maintains a sufficient quantity of hot spare storage space that can be made available for reconstructing the user data and restoring redundancy in the event one of the storage disks fails. Until a disk fails, however, the memory manager uses the hot spare space to store user and redundant data while guaranteeing that the storage space can be used for rebuilding following a storage disk failure. In this manner, all storage disks in the array are used to store user data, and additionally to maintain storage space that can be easily made available for purposes of hot spare in the event of disk failure.
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"RAID: High-Performance, Reliable Secondary Storage" by Peter M. Chen, Edward K. Lee, Garth A. Gibson, Randy H. Katz and David A. Patterson; Mar. 1994.
Burkes Theresa A.
Diamond Bryan M.
Dolphin Wade A.
Jacobson Michael B.
Nelson Marvin D.
Hewlett--Packard Company
Saunders Keith W.
Swann Tod R.
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