User Manual

SCSI Commands Reference Manual, Rev. J 493
www.seagate.com Parameters for direct access devices
IDENTIFIER TYPE field
The IDENTIFIER TYPE field specifies the format and assignment authority for the identifier, as described in tables 463 and 464.
Table 463 IDENTIFIER Type field
Value Description
0h
No assignment authority was used and consequently there is no guarantee that the identifier is globally unique (i.e.,
the identifier is vendor specific).
1h
The first 8 bytes of the IDENTIFIER field are a Vendor ID. The organization associated with the Vendor ID is responsible
for ensuring that the remainder of the identifier field is unique. One recommended method of constructing the
remainder of the identifier field is to concatenate the product identification field from the standard INQUIRY data field
and the product serial number field from the unit serial number page.
2h
The IDENTIFIER field contains a Canonical form IEEE Extended Unique Identifier, 64-bit (EUI-64). In this case, the identi-
fier length field shall be set to 8. Note that the IEEE guide-lines for EUI-64 specify a method for unambiguously encap-
sulating an IEEE 48-bit identifier within an EUI-64.
3h
The IDENTIFIER field contains an FC-PH, FC-PH3 or FC-FS Name_Identifier. Any FC-PH, FC-PH3 or FC-FS identifier may
be used, including one of the four based on a Canonical form IEEE company_id.
4h
If the ASSOCIATION field contains 1h, the Identifier value contains a four-byte binary number identifying the port rela-
tive to other ports in the device using the values shown Table 462. The CODE SET field shall be set to 1h and the IDEN-
TIFIER LENGTH field shall be set to 4h. If the ASSOCIATION field does not contain 1h, use of this identifier type is
reserved.
5h
If the Association value is 1h, the Identifier value contains a four-byte binary number identifying the port relative to
other ports in the device using the values shown Table
462. The CODE SET field shall be set to 1h and the IDENTIFIER
LENGTH field shall be set to 4h. If the ASSOCIATION field does not contain 1h, use of this identifier type is reserved.
6h
If the ASSOCIATION value is 0h, the IDENTIFIER value contains a four-byte binary number identifying the port relative
to other ports in the device using the values shown Table
462. The CODE SET field shall be set to 1h and the IDENTI-
FIER LENGTH field shall be set to 4h. If the ASSOCIATION field does not contain 0h, use of this identifier type is
reserved.
7h
The MD5 logical unit identifier shall not be used if a logical unit provides unique identification using identifier types
2h or 3h. A bridge device may return a MD5 logical unit identifier type for that logical unit that does not support the
Device Identification VPD page.
8h - Fh
Reserved.