Data storage management for network interconnected processors

Patent 5537585 Issued on July 16, 1996. Estimated Expiration Date:

February 25, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Avail Systems Corporation

Application

No. 201658 filed on 02/25/1994

US Classes:

707/205, File allocation707/204, Archiving or backup711/113, Caching711/117Hierarchical memories

Examiners

Primary: Black, Thomas G.
Assistant: Lintz, Paul R.

Attorney, Agent or Firm

Duft, Graziano & Forest

Foreign Patent References

WO92/09035 WO. 11/13/1990

International Class

G06F 017/30

Abstract

The data storage system is connected to a local area network and includes a storage server that on a demand basis and/or on a periodically scheduled basis audits the activity on each volume of each data storage device that is connected to the network. Low priority data files are migrated via the network and the storage server to backend data storage media, and the directory resident in the data storage device is updated with a placeholder entry to indicate that this data file has been migrated to backend storage. When the processor requests this data file, the placeholder entry enables the storage server to recall the requested data file to the data storage device from which it originated.

Other References

R. D. Christman, "Experience With File Migration", Report #LA 9014-MS, UC-32, Los Alamos National Laboratories, 1981, pp. 1-13
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