Disk system

Details Disk system Disk system

1982-10-27

1985-01-15

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 1300

Patent

active

044942150

ABSTRACT:
A disk system comprising a plurality of disk units (1-0 to 1-7) divided into primary logical volumes (101 to 171) and secondary logical volumes (102 to 172) which are controlled by a plurality of disk controllers (4-AA to 4-BB). One of disk controllers sets an assign bit to cause one of the logical volumes to perform a stand-alone operation. This assign bit can be reset by another disk controller for another logical volume, which generates an unconditional reserve command. In this system, flip-flops (18, 19) for storing a stand-alone control signal, decoders (7-AA.about.7-BB) for an unconditional reserve command, interruption signal generating circuits (27, 28), a notification circuit (9), and the like are provided so that the issuance of an unconditional reserve command is notified to the corresponding disk controller.

REFERENCES:
patent: 4303988 (1981-12-01), Tsuboka et al.

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