Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral configuration
Reexamination Certificate
2003-09-29
2008-10-21
Hafiz, Tariq R. (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral configuration
C710S016000, C707S793000, C711S221000
Reexamination Certificate
active
07441052
ABSTRACT:
A disaster recovery technique for computer systems obtains backup copies of data by arranging recording devices like direct-access disk devices into copy pairs of primary and secondary devices. Management of the device copy pairs within a single system and across multiple systems is facilitated by constructing maps of device information that provide a cross-reference between I/O subsystem device numbers and hardware addresses. Information structures are constructed from the maps and used to facilitate defining and managing groups of device copy pairs.
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Attanese Thomas A.
Demaray Milton W.
Gallagher & Lathrop
Hafiz Tariq R.
Hitachi Data Systems Corporation
Lathrop, Esq. David N.
Mendenhall, Esq. Larry
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