Doug, > No. sg_rmsn issues a READ MEDIA SERIAL NUMBER SCSI command. > This command (opcode 0xab, service action 1) was added in > SPC-3 revision 11 (12th February 2003) and is not marked as > mandatory. If supported, this command yields a "free format" > media serial number. I have not seen any SCSI device that > supports it (but being in SPC-3 all device types, especially > those with removable media, could support it). Ahh... Note to self: ingest caffeine, THEN read mailing list! Thanks for the information. Drew - : 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