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4.1 Control/Sense Commands
a. Qualifier field
(0,0,0): The specified logical unit shows the type of input/output device
shown in the "Device Type Code" field. Even if this code is
reported, it does not mean that that logical unit is in the ready
state.
(0,0,1): The specified logical unit shows the type of input/output device
shown in the "Device Type Code" field, but it shows that an
actual input/output device is not connected to that logical unit.
The HDD does not report this code.
(0,1,1): Shows that the specified logical unit is not supported. When
this code is reported, it X '1F' is shown in the "Device Type
Code" field.
b. Device type code
(0,0,0,0,0): Direct access device
(1,1,1,1,1): Undefined device
c. RMB bit
When this bit is "1," it indicates that the storage media is a removable
disk device. The HDD is a fixed disk device, so this bit is always
reported as "0."
d. Version
The VERSION field indicates the implemented version of this standard
and is defined below.
Table 4.2 VERSION field
Code Description
X'01' ANSI X3.131: 1986 (SCSI-1)
X'02' ANSI X3.131: 1994 (SCSI-2)
X'03' ANSI X3.301: 1997 (SPC Rev.11)
(HDD always Responds this value.)
X'04' T10/1236-D (SPC-2)
C141-C013 139