Inquiry (12) - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

7.5 INQUIRY (12)

Byte
7 6
0
1 LUN
2
3
4
5 VU = 0
Figure 60. INQUIRY (12)
The INQUIRY command requests the parameters of the target to be sent to the initiator.
An EVPD bit of one specifies that the file shall return the vital product data page identified by the Page
1
Code field in the CDB. Page code specifies which page of vital product data information the file shall
return.
EVPD PAGE
CODE
0 0
0 Non Zero
1 Supported
1 Unsupported
Allocation Length specifies the number of bytes that the initiator has allocated for INQUIRY data to be
returned. An allocation length of zero implies that no data is to be returned. The file will terminate the
DATA IN phase when all available INQUIRY data has been transferred or when allocation length bytes
have been transferred, whichever is less.
If an INQUIRY command is received from an initiator with a pending unit attention condition (before the
target reports CHECK CONDITION status), the file processes the INQUIRY command. The unit atten-
tion condition is not cleared by this action.
1 The available VPD pages are defined in the addendum provided for each different file model in the section entitled
Inquiry Data Format.
70
O E M Spec. of DDRS-3xxxx
Bit
5 4 3
Command Code = 12h
Reserved = 0
Page Code
Reserved = 0
Allocation Length
Reserved = 0
Description
The file returns the standard INQUIRY data.
The file returns CHECK CONDITION status with the sense key of
ILLEGAL REQUEST and the additional sense code of INVALID FIELD
IN CDB.
The file returns the vital product data of page code requested.
The file returns CHECK CONDITION status with the sense key of
ILLEGAL REQUEST and the additional sense code of INVALID FIELD
IN CDB.
2 1 0
EVPD
FLAG LINK