SC2500 User Guide Ver 2.1
May 6, 2003
Page 12 of 26
3.3.7 Inquiry Command – 12h
The INQUIRY command requests that information regarding parameters of the
SC2500 be sent to the initiator.
Inquiry CDB
An enable vital product data (EVPD) bit of one specifies that the SC2500 return
the optional vital product data specified by the page code field. If any optional
fields in the CDB are set that the SC2500 does not support, it will return a
CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and
an additional sense code of INVALID FIELD IN CDB.
An EVPD bit of zero specifies that the SC2500 return the standard INQUIRY
data. If the page code field is not zero, the target shall return CHECK
CONDITION status with the sense key set to ILLEGAL REQUEST and an
additional sense code of INVALID FIELD IN CDB. The page code field specifies
which page of vital product data information the SC2500 return.
The INQUIRY command shall return CHECK CONDITION status only when the
target cannot return the requested INQUIRY data. The INQUIRY data should be
returned even though the peripheral device may not be ready for other
commands. If an INQUIRY command is received from an initiator with a
pending unit attention condition, the SC2500 will perform the INQUIRY
command and not clear the unit attention condition.
