Universal multi-path driver for storage systems including an...

Details Universal multi-path driver for storage systems including an... Universal multi-path driver for storage systems including an...

2008-07-29

2008-07-29

Lohn, Joshua A (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S043000, C709S239000

Reexamination Certificate

active

07406617

ABSTRACT:
An embodiment of the invention is a technique for monitoring via a universal multipath driver (UMD) a first path to one of a plurality of virtual device objects. The virtual device objects are created by the UMD and correspond to a plurality of functional device objects. The functional device objects are created by a plurality of lower level drivers and correspond to a plurality of real physical devices having M device types including an external boot device. The UMD is a functional driver of each of the functional device objects. The lower level drivers control the real physical devices. The UMD detects a failure of the first path to a first virtual device object corresponding to a first real physical device and performs one of failover and failback for the first real physical device.

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