Recently, in draft spc5r08, T10 added a locally assigned RFC 4122
UUID *** designation descriptor. That descriptor can now be
returned for VPD page 0x83 (device identification) amongst others.
It can be used anywhere SCSI needs a unique identifier expanding
the previous set of preferred identifiers: EUI, NAA and SCSI_name
(iSCSI).

In the soon to be released sg3_utils version 1.42 the new UUID
designation descriptor is decoded including Hannes' --export
option found in sg_inq, for example:

# sg_inq --export /dev/sg0
  ...
  SCSI_IDENT_LUN_UUID=11223344-5566-7788-aabb-ccddeeffffee

Perhaps some udev work is needed to incorporate this new identifier.

Doug Gilbert

** see  https://en.wikipedia.org/wiki/Universally_unique_identifier
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