Fujitsu MAX3073NC - SCSI,80, Dell DC961,Hard Drive Scsi Logical Interface Specifications page 72

Command Specifications
c. CDB size
This field contains the number of bytes in the CDB for the operation code being queried, and the size
of the "CDB Usage Data" field in the return data.
d. CDB usage data
This field contains information about the CDB for the operation code being queried. The first byte
of the "CDB usage data" contains the operation code for the operation being queried. All bytes
except the first byte of the "CDB usage data" contains a usage map for bits in the CDB for the
operation code being queried.
The bits in the "Usage map" have a one-for-one correspondence to the CDB for the operation code
being queried. If the device server evaluates a bit as all or part of a field in the CDB for the
operation code being queried, the usage map contains a one in the corresponding bit position. If the
device server ignores or treats as reserved a bit in the CDB for the operation code being queried, the
usage map contains a zero in the corresponding bit position. The usage map bits for a given CDB
field all have the same value.
Thus, the CDB usage bit map for Inquiry command for a device server that implements command
support data but not vital product data is: 12h, 02h, FFh, 00h, FFh, 01h.
(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)
00
80
C0
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.
3-10
Page code list of supported VPD information
Device serial number
Operation mode
Function
C141-C010