Method and apparatus for identifying multiple paths to a...

Details Method and apparatus for identifying multiple paths to a... Method and apparatus for identifying multiple paths to a...

2006-06-27

2006-06-27

Peyton, Tammara (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S001000, C710S009000, C710S033000, C710S072000, C710S074000, C710S301000, C710S316000, C714S002000, C709S201000, C709S203000

Reexamination Certificate

active

07069354

ABSTRACT:
The method includes querying for one or more logical unit numbers (LUNs) pertaining to a small computer system interface device, each LUN representing a potential path from a host to the SCSI device. Response data indicative of multiple LUNs to the single SCSI device is treated as separate instances of independent SCSI devices, with each separate instance representing a different SCSI separate instances of independent SCSI devices, with each separate instance representing a different SCSI device structure. A unique identifier (UID) is calculated for each SCSI device structure, from which a device file is generated based on the UID and contains UID and path information that differentiates between multiple paths from the host to the SCSI device.

REFERENCES:
patent: 6779064 (2004-08-01), McGowen et al.
patent: 2003/0177168 (2003-09-01), Heitman et al.
patent: 2003/0200477 (2003-10-01), Ayres

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