Avoiding use of an inter-unit network in a storage system...

Details Avoiding use of an inter-unit network in a storage system... Avoiding use of an inter-unit network in a storage system...

2007-12-18

2010-12-07

Bragdon, Reginald G (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S154000, C711SE12001, C710S036000, C710S038000, C710S008000, C710S031000, C710S033000

Reexamination Certificate

active

07849265

ABSTRACT:
A storage system provides virtual ports, and is able to transfer the virtual ports among physical ports located on multiple storage control units making up the storage system. The storage system is able to manage logical volumes and/or virtual volumes and virtual ports as a group when considering whether to move logical/virtual volumes and/or virtual ports to another storage control unit in the storage system. When the storage system is instructed to transfer volumes, virtual ports, or a group of volumes and virtual ports among the storage control units, the storage system determines whether an inter-unit network will be required to be used following the transfer. When the storage system determines that the inter-unit network will be required if the transfer takes place, the storage system determines and presents an alternate storage control unit for the transfer to avoid use of the inter-unit network, thereby avoiding degraded performance.

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Fibre Channel Framing and Signaling-3 (FC-FS-3) , Rev. 0.20 INCITS working draft proposed American National Standard for Information Technology, Jun. 2, 2007.

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