e02136r1
World Wide Name Definition for ATA Devices
To:
T13 Technical committee
From: Sumit Puri
Fujitsu Computer Products
2904 Orchard Parkway
San Jose, CA 95134
Phone: 408-570-4070
Fax:
408-570-4009
Email: spuri@fcpa.fujitsu.com
Date: 9-30-2002
1.0 Introduction
The purpose of this proposal is to add World Wide Name identification to ATA devices. This
proposal defines a World Wide Name unique ID, this information will be part of the IDENTIFY
DEVICE data. The World Wide Name identification is a 64 bit worldwide unique name based
upon a company’s IEEE identifier, and a 32 bit vendor unique serial number.
3 Definitions, abbreviations, and conventions
3.1 Definitions and abbreviations
3.1.x World Wide Name (WWN): This is a 64 bit worldwide unique name based upon a
company’s IEEE identifier, and a 32 bit vendor unique serial number.
5.16 IDENTIFY DEVICE
5.16.8 Description
Table 14 - IDENTIFY DEVICE information
Word
TBD0
O/M
M
F/V
F
Description
X
1 = World Wide Name definition is supported
0= World Wide Name definition is NOT supported
Word
TBD1
O/M
O
F/V
F
Description
15-12 NAA (0:3)
11-0
IEEE OUI (0:11)
TBD2
O
F
15-4
3-0
IEEE OUI (12:23)
Unique ID (0:3)
TBD3
O
F
15-0
Unique ID (4:19)
TBD4
O
F
15-0
Unique ID (20:35)
5.16.x Word TBD0
Bit X of Word TBD0 shall be set to one if World Wide Name definition is supported.
Bit X of Word TBD0 shall be cleared to zero if World Wide Name definition is not supported.
5.16.x Word (TBD1:TBD4)
The contents of these words contain the value of the WWN (World Wide Name) of the Device –
This is a 64 bit field made of three components.
NAA(0:3) which contains 5h (0101b). This defines the Naming Authority to be the
IEEE. All other combinations of this also point to the IEEE.
IEEE OUI (0:23) – this field is a 24 bit containing the Organizationally Unique
Identifier assigned by the IEEE to a company or organization. Details on the acquisition of this
number can be found on the IEEE web site www.ieee.org .
Unique ID (0:35) – A field defined by the company or other organization holding
the OUI defined above. A requirement is that the OUI holder guarantees that this is a unique
number within the OUI domain.