Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-03-31
2009-11-03
Bragdon, Reginald G (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S112000
Reexamination Certificate
active
07613890
ABSTRACT:
Concurrently replicating a plurality of storage devices includes disabling writes to all of the storage devices, setting a pending state change indicator for all of the storage devices after disabling writes without altering a replication state of any of the storage devices, and enabling writes to the storage devices after setting the pending state change indicator. An I/O operation to a particular one of the storage devices having a set pending state change indicator may cause the replication state of the particular one of the storage devices to change to provide for replication. Concurrently replicating a plurality of storage devices may include, following changing the replication state of the particular one of the storage devices, clearing the pending state change indicator.
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Bragdon Reginald G
EMC Corporation
Muirhead and Saturnelli LLC
Vo Thanh D
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