Chapter 4. Inquiry-12H; Command Description; Table 4-1: Inquiry Command-12H; Table 4-2: Inquiry Command Field Values - Spectra Logic Spectra S50 User Manual

4 Inquiry—12h

Command Description

The INQUIRY command instructs the library to send information regarding its parameters
to the initiator. The table below shows the CDB for the INQUIRY command.
Table 4-1: Inquiry Command–12h
Bits
Byte 7
00
01
02
03
04
05 0
a. These bits are ignored.

Table 4-2: Inquiry Command Field Values

Values
Field Name Allowed
Logical Unit
0h
Number
CMDDT 0
0
Enable Vital
Product Data
1
00h
Page Code 80h
83h
Allocation
00-FFh
Length
6 5
a
Obsolete
0
Meaning
This bit is ignored.
Command support data.
Requests the library to return only the standard Inquiry Data page. (The Page Code must be 0.)
Requests that the library return the Page Code page.
When the EVPD bit is 1, this returns a list of supported pages (00h, 80h, 83h).
When the EVPD bit is 1, this returns the library's serial number page.
When the EVPD bit is 1, this returns the library's identification page.
Specifies the number of bytes the initiator allocates for data returned from the inquiry
command. Zero indicates no inquiry data is to be transferred; this condition is not considered an
error. The library terminates the data in phase when it transfers either the number of bytes
specified by the allocation length field or all of the available inquiry data, whichever is less. The
data length for the standard inquiry data returned by the library is 38h (56 bytes).
4 3
Operation Code (12h)
Reserved
Page Code
Reserved
Allocation Length
Reserved
16
2 1
CMDDT
0 0
0
EVPD
0