Dynamic physical and virtual multipath I/O

Details Dynamic physical and virtual multipath I/O Dynamic physical and virtual multipath I/O

2008-11-10

2011-10-18

Beausoliel, Jr., Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S004110, C714S043000

Reexamination Certificate

active

08041987

ABSTRACT:
Embodiments that dynamically manage physical and virtual multipath I/O are contemplated. Various embodiments comprise one or more computing devices, such as one or more servers, having at least two HBAs. At least one of the HBAs may be associated with a virtual I/O server that employs the HBA to transfer data between a plurality of virtual clients and one or more storage devices of a storage area network. The embodiments may monitor the availability of the HBAs, such as monitoring the HBAs for a failure of the HBA or a device coupled to the HBA. Upon detecting the unavailability of one of the HBAs, the embodiments may switch, dynamically, from the I/O path associated with the unavailable HBA to the alternate HBA.

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Srikrishnan, et al., “Sharing FCP Adaptors Through Virtualization,” IBM J. Res. & Dev., vol. 51, No. 1/2, Jan./Mar. 2007, pp. 103-118.

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