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C141-E124-01EN 3 - 11
(7) VPD information
When "1" is specified in the "EVPD" bits of the CDB, the VPD information described below is
transferred to the INIT by this command. The INIT specifies the type of VPD information
required in the "Page code" field of the CDB. The type of VPD information supported by the IDD
and its page code number are as shown below.
Page Code Page (Hex) Function
00 Page code list of supported VPD information
80 Device serial number
C0 Operation mode
Furthermore, if page codes other than those shown above (VPD information that is not supported
by the IDD) are specified in the CDB, that command is terminated with a CHECK CONDITION
status (ILLEGAL REQUEST [=5] / Invalid field in CBD [=24-00]).
The format and contents of each type of VPD information are shown below.
a. Page code list
This VPD information reports the page code list of VPD information supported by the IDD.
The format of this VPD information is shown in Figure 3.3.
Bit
Byte
76543210
0 Qualifier Device Type Code
1 X‘00’ (Page Code)
2 X‘00’
3 X‘03’ (Page Length)
4 X‘00’ (Page Code List)
5 X‘80’ (Device Serial No.)
6 X‘C0’ (Operation Mode)
Figure 3.3 VPD information: VPD identifier list
The values indicated in the "Qualifier" and "Device Type Code" fields in byte 0 are the same
as those in the previously mentioned standard INQUIRY data. The "Page code" field in byte 1
indicates the page code (X '00') of this VPD information itself. Also, the "Page length" field in
byte 3 indicates the length (byte length) after byte 4. This value has no relationship to the
specification in the "Transfer Byte Length" in the CDB, but indicates the length of this VPD
information and is always X '03' (Total data length = 7 bytes).