Method and apparatus for identifying multiple paths to a SCSI device using a calculated unique identifier

An apparatus for identifying multiple paths from a host from a host to a small computer system interface (SCSI) device, comprising:

• means for querying the SCSI device to determine if there are one or more logical unit numbers (LUNs) pertaining to the SCSI device, each LUN representing a potential path from the host to the SCSI device;
• means for treating responses containing data indicative of multiple LUNs as separate instances of independent SCSI devices, each separate instance representing a different SCSI device structure that pertains to the SCSI device;
• means for calculating a unique identifier (UID) for each SCSI device structure;
• and
• means for generating at least one device file based on the one or more UIDs, respectively, each device file containing UID and path information that differentiates between multiple paths to the same SCSI device.