Emc Corporation

Emc Coropration

Shai Bar-Nefy

Ruben Michel

David W DesRoches

Avinoam Zakai

Victoria Dubrovsky

Tao Kai Lam

A method balances workloads of storage devices of a storage subsystem. The method includes reading a mailbox to obtain control parameters and collecting historical data on numbers of accesses to storage volumes of the storage devices. The control parameters are written in the mailbox by host devices. The method also includes selecting data swaps that lead to better balanced workloads for storage devices based on the historical data. The act of selecting and/or the act of collecting being initialized by the control parameters.

Mailbox for controlling storage subsystem reconfigurations

A method and an apparatus for reconfiguring a storage subsystem by performing an ordered sequence of reconfigurations of physical storage volumes of the storage subsystem. The method and apparatus perform a portion of the sequence of reconfigurations, in response to receiving a rollback request, in an order that is reversed with respect to the order of the sequence.

Rolling back storage subsystem reconfigurations

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Shrewsbury, MA, United States of America

Shai Bar-Nefy