Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output process timing
Reexamination Certificate
2007-07-19
2010-10-26
Shin, Christopher B (Department: 2181)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output process timing
C710S015000, C711S162000, C714S006130
Reexamination Certificate
active
07822892
ABSTRACT:
Provided are a method, system, and article of manufacture for managing the copying of writes from primary storages to secondary storages across different networks. Information is maintained on a first group of at least one primary storage, at least one primary device managing Input/Output (I/O) access to the at least one primary storage, and at least one corresponding secondary storage to which writes to the at least one primary storage are copied and a second group of at least one primary storage, at least one primary device managing Input/Output (I/O) access to the at least one primary storage, and at least one corresponding secondary storage to which writes to the at least one primary storage are copied. A failure notification is received from one of the primary devices in the first or second group of a failure to copy a write from the primary device to the secondary device. A freeze command is issued over a first network, using a first network protocol, to the at least one primary device in the first group to stop copying writes to the corresponding at least one secondary device. A freeze command is issued over a second network, using a second network protocol, to the at least one primary device in the second group to stop copying writes to the corresponding at least one secondary device.
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Boyd Kenneth Wayne
Day III Kenneth Fairclough
Edel Stephen Francis
McBride Gregory Edward
International Business Machines - Corporation
Konrad Raynes & Victor LLP
Shin Christopher B
Victor David W.
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