Remote disk control apparatus, and remote disk control method

Details Remote disk control apparatus, and remote disk control method Remote disk control apparatus, and remote disk control method

2008-08-08

2009-12-15

Thomas, Shane M (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S113000, C709S200000, C360S048000

Reexamination Certificate

active

07634616

ABSTRACT:
A disk control apparatus performing input/output control of data of a storage disk device according to an input/output request from a host includes a cache memory which stores a part of the data and a management table which has format information for indicating whether a track of the storage disk device has been initialized to a predetermined track format for each track of the storage disk device. A control unit creates track format information of the predetermined track format referring to the management table when an input/output request is received from the host. A remote unit transfers initialization information of the management table to another disk control apparatus of a secondary center according to a copy instruction from the host. The control unit updates the format information of the target track in the management table to complete initialization of the target track.

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“Count-Key-Data Disks” email from Dick Wilmot, Jun. 24, 1994, pp. 1-2. URL:http://alumnus.caltech.edu/˜rdv/comp-arch-storage/ckd-disks.html.

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