User Manual

SCSI Commands Reference Manual, Rev. J 95

www.seagate.com Direct Access Block commands (SPC-5 and SBC-4)

PERIPHERAL QUALIFIER and PERIPHERAL DEVICE TYPE fields

The PERIPHERAL QUALIFIER field and PERIPHERAL DEVICE TYPE field identify the peripheral device connected to the logical unit. If the SCSI tar-

get device is not capable of supporting a peripheral device connected to this logical unit, the device server shall set these fields to 7Fh (i.e.,

PERIPHERAL QUALIFIER field set to 011b and PERIPHERAL DEVICE TYPE field set to 1Fh).

The peripheral qualifier is defined in table 60 and the peripheral device type is defined in table 61

Vendor specific parameters

96 (MSB)

n (LSB)

Table 60 PERIPHERAL QUALIFIER

Qualifier Description

000b

A peripheral device having the specified peripheral device type is connected to this logical unit. If the device server is

unable to determine whether or not a peripheral device is connected, it also shall use this peripheral qualifier. This

peripheral qualifier does not mean that the peripheral device connected to the logical unit is ready for access.

001b

A peripheral device having the specified peripheral device type is not connected to this logical unit. However, the

device server is capable of supporting the specified peripheral device type on this logical unit.

010b

Reserved

011b

The device server is not capable of supporting a peripheral device on this logical unit. For this peripheral qualifier the

peripheral device type shall be set to 1Fh. All other peripheral device type values are reserved for this peripheral quali-

fier.

100b - 111b

Vendor specific

Table 59 Standard INQUIRY data format

Bit

Byte

7 6 5 4 3 2 1 0