In SCSI-3 SPC, I was going through the section on "Device Identification VPD Page" (Section 7.6.3). I see the following: If "Association" field in VPD83 page is set to 00b (i.e., The IDENTIFIER field is associated with the addressed logical unit), the above standard says: At least one identification descriptor should have the IDENTIFIER TYPE field set to: a) 2h (i.e., EUI-64-based); b) 3h (i.e., NAA); or c) 8h (i.e., SCSI name string). Going through the details of (a) and (b), I notice that they are numeric. However, (c) above is an ASCII string. But, even in this case, if the first 4 UTF-8 characters are parsed, the rest of it contains numeric value in ASCII. For all SCSI disks that are SCSI-3 SPC compliant, for the above case, is it safe to say: each of them shall have an associated "numeric value" that is "unique" (assuming that the 4 UTF-8 characters for "SCSI name string" format are stored/available). Thanks, -Kishore -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html