hesela.devSCSI Unit Serial Number
The SCSI Unit Serial Number VPD page 0x80 reports a vendor-assigned product serial number for the addressed target or logical unit.
The serial uses a vendor-defined format; it is not the typed descriptor list returned by Device Identification page 0x83. Keep vendor and product context with it when comparing device inventories. [1] [2]
A host property named ID_SERIAL need not be the raw page-0x80 value. By default, systemd v257 scsi_id prefers supported page-0x83 identifiers; its page-0x80 path constructs a string from an S prefix, vendor, model and serial. A derived host identifier and the reported serial therefore need separate labels in an evidence record. [3] [4]
Relations
Citations
- Douglas Gilbert: sdparm 1.12 documentation, VPD pages and descriptor associations
- Seagate SCSI Commands Reference Manual, 100293068 Rev. L (November 2020), sections 5.4.9 and 5.4.22
- systemd v257: scsi_serial.c, check_fill_0x83_id, do_scsi_page80_inquiry and scsi_get_serial
- systemd v257: scsi_id.c, sanitized ID_SERIAL and ID_SERIAL_SHORT exports
Sources & caveats
- Primary documentation and pinned implementation review on 2026-11-03; no device interrogation, failover experiment or global-uniqueness measurement.