User's Manual

DLT2000 SCSI Interface
DLT2000/DLT2700 Cartridge Tape Subsystem 8-17
8.4.4 INQUIRY (12h)
Bit
76543210
0 Operation Code (12h)
Logical Unit Number Reserved EVPD
Page Code
Byte
Flag LinkUnused
1
Reserved
2
Allocation Length
3
Reserved
4
5
Figure 8-4 INQUIRY CDB
INQUIRY tells the drive to send information regarding the device's parameters to the
initiator.
The INQUIRY command executes normally even if the specified LUN is not attached.
INQUIRY returns a Check Condition status only when the target cannot return the
requested Inquiry data. If INQUIRY is received from an initiator with a pending UNIT
ATTENTION condition (before the drive reports CHECK CONDITION status), the
target will perform the INQUIRY and will not clear the UNIT ATTENTION condition.
EVPD
The DLT2000 implements the Vital Product Data pages option on LUNs 0 and the
optional medium loader LUN.
Page Code
There are three Vital Product Data pages implemented:
00h - Supported Vital Product Data pages
80h - Unit Serial Number page
C0h - Code Build Information page
If the page code field contains a different value, the drive generates a CHECK
CONDITION with ILLEGAL REQUEST sense key.
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