Lock control for a shared storage in a data processing system

Details Lock control for a shared storage in a data processing system Lock control for a shared storage in a data processing system

1984-12-31

1988-03-22

Williams, Jr., Archie E.

Boots, shoes, and leggings

G06F 1300

Patent

active

047333529

ABSTRACT:
In a lock control for a shared storage, each storage controller (SC) includes circuitry (LKA) for holding the addresses locked by any of the storage utilizing units connected thereto and circuitry (FLKA) for holding a copy of the contents of LKAs of the other SCs. When one storage utilizing unit connected to one SC issues a storage access request, its requested address is compared with the contents of the LKA and FLKA in the associated SC, thus determining whether or not the requested address is locked by any other storage utilizing unit connected to that particular SC or by any of the storage utilizing units connected to the other SCs. Each storage utilizing unit may include a FLKA.

REFERENCES:
patent: 3469239 (1969-09-01), Richmond et al.
patent: 4056844 (1977-11-01), Izumi
patent: 4136386 (1979-01-01), Annunziata et al.
patent: 4561051 (1985-12-01), Rodman et al.

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