## Volume Identification {#ssc:volident}
The pNFS SCSI layout uses the Device Identification Vital Product Data (VPD)
-page (page code 0x83) from {{SPC5}} to identify the devices used by
+page (page code 83h) from {{SPC5}} to identify the devices used by
a layout. Implementations that use NVMe namespaces as storage devices
map NVMe namespace identifiers to a subset of the identifiers
that the Device Identification VPD page supports for SCSI logical
Namespace Globally Unique Identifier (NGUID) value reported in a Namespace
Identification Descriptor, the I/O Command Set Independent Identify
Namespace Data Structure, and the Identify Namespace Data Structure,
-NVM Command Set. If available, use of the NGUID value is preferred
-as it is the larger identifier.
+NVM Command Set {{NVME-BASE}}. If available, use of the NGUID value is
+preferred as it is the larger identifier.
Note: The PS_DESIGNATOR_T10 and PS_DESIGNATOR_NAME have no equivalent
in NVMe and cannot be used to identify NVMe storage devices.
identifiers are available, then the NGUID identifier SHOULD be
used as it is the larger identifier.
-RFC 8154 specifies the "sbv_designator" field as an XDR variable length
-opaque\<>. The length of that XDR opaque\<> value (part of
+RFC 8154 {{RFC8154}} specifies the "sbv_designator" field as an XDR variable
+length opaque\<>. The length of that XDR opaque\<> value (part of
its XDR representation) indicates which NVMe identifier is present.
That length MUST be 16 octets for an NVMe NGUID identifier and
MUST be 8 octets for an NVMe EUI64 identifier. All other lengths
Abort), the Current Reservation Key (CRKEY) field set to the
server's reservation key, the Preempt Reservation Key (PRKEY) field
set to the reservation key associated with the non-responding client
-and the Reservation Type (RTYPE) field set to 010b (i.e., Exclusive
+and the Reservation Type (RTYPE) field set to 4h (i.e., Exclusive
Access - Registrants Only Reservation).
The client can distinguish I/O errors due to fencing from other
errors based on the Reservation Conflict NVMe status code.