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INQUIRY
6.2. INQUIRY 12h
Bit
7
Byte
0
1
2
3
4
5
INQUIRY tells the drive to send information regarding the drive parameters to the initiator.
CmdDT: The Command support data (CmdDT) bit of one specifies that the drive returns the optional support data
specified by the operation code field.
EVPD: The Enable Vital Product Data (EVPD) bit of one specifies that the drive returns the optional vital product
data specified by the page code field.
If both the CmdDT and EVPD bits are zero, the drive returns the standard INQUIRY data. If the page or operation
code field is not zero when both CmdDT and EVPD are zero, the drive returns a CHECK CONDITION status with an
ILLEGAL REQUEST Sense Key.
If the CmdDT and EVPD bits are one, the drive returns a CHECK CONDITION status with an ILLEGAL REQUEST
Sense Key.
When the EVPD bit is set to one, the drive returns vital product data that is specified in the page or operation code
field. If the page or operation code field is reserved or not implemented by the target, the target shall terminate the
command with a CHECK CONDITION status. The sense key shall be set to ILLEGAL REQUEST.
When the CmdDT bit is set to one, the page or operation field specifies the SCSI operation code for which the drive
shall return support data.
Allocation Length: This specifies the maximum number of bytes that the initiator has allocated for returned Inquiry
data. An Allocation Length of ZERO indicates that no Inquiry data is transferred. This condition is not considered an
error. The drive will terminate the DATA IN phase when Allocation Length bytes have been transferred or when all
available Inquiry data have been transferred to the initiator, whichever is less.
SONY AIT-3Ex drive SDX-800V series Ver.1.0
6
5
Operation Code (12h)
Obsolete
Page or Operation Code
4
3
2
Reserved
Reserved
Allocation Length
Control
6.Command Specification
1
0
CmdDT
EVPD
6-3
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