Seagate Ultra160 Product Manual page 180

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[c] The Identifier Type field specifies the format and assignment authority for the identifier, as described
in tables 96 and 97.
Table 96: Identifier Type
Value Description
0h No assignment authority was used and consequently there is no guarantee that the identifier is glo-
bally unique (i.e., the identifier is vendor-specific).
1h The first 8 bytes of the identifier field are a Vendor ID (see annex C). 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 prod-
uct 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 identifier length field shall be set to 8. Note that the IEEE guide-lines for EUI-64 specify a
method for unambiguously encapsulating 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 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 97. In this case, the CODE
SET field shall be set to 1h and the Identifier Length field shall be set to 4. If the Association value is
not 1h, use of this identifier type is reserved.
5h - Fh Reserved.
Table 97: Relative Port identifier values
Value
0h
1h
2h
3h - 7FFFFFFFh
80000000h - FFFFFFFFh
[d] The Identifier Length field specifies the length in bytes of the Identifier field. If the ALLOCATION
LENGTH field of the command descriptor block is too small to transfer all of the identifier, the identifier
length shall not be adjusted to reflect the truncation.
Description
Reserved
Relative port 1, also known as port A
Relative port 2, also known as port B
Relative port 3 through 2 147 483 647
SCSI Interface Product Manual, Rev. B