Seagate Ultra 320 Packetized Failures field Bit Byte, Packetized Failures code Codes Description

Data List Length field and shall assume a length of zero.

[4]If packetized failure data is provided, the Packetized Failures Valid (RSPVALID) bit shall be set to one and the Packetized Failures List Length field shall specify the number of bytes in the Packetized Failures field. The Packetized Failures List Length field shall contain a length of 4. Other lengths are reserved for future standardization. If no packetized failure data is provided, the packetized failures valid bit shall be set to zero. The initiator shall ignore the Packetized Failures List Length field and shall assume a length of zero. The Packetized Failures field (see Table 55) contains information describing the packetized failures detected during the execution of a task. The Packetized Failures field shall contain valid information if the target detects any of the conditions described by the packetized failure code (see Table 56).

[5]The Status field contains the status of a task that completes. See Section 7.3, Table 64, for a list of status codes.

[6]The iuCRC field shall use the algorithm defined in Subsection 11.3, ANSI SCSI Parallel Interface (SPI-5), T10/1525D.

The Packetized Failures field (see Table 55) contains information describing the packetized failures detected during the execution of a task. The Packetized Failures field shall contain valid information if the target detects any of the conditions described by the packetized failure code (see Table 56).

Table 55:	Packetized Failures field
Bit	7	6	5		4		3	2	1	0
Byte
0						Reserved
1						Reserved
2						Reserved
3				PACKETIZED FAILURE CODE [1]

[1]The Packetized Failures Code is defined in Table 56.

Table 56: Packetized Failures code Codes Description

00h	Indicates no failure or task management function complete.
01h	Reserved.
02h	SPI command information unit fields invalid.
03h	Reserved.
04h	The task management function not supported.
05h	The task management function failed.
06h-FFh	Reserved.

The Sense Data field contains the information specified by the SCSI Primary Commands-4 (SPC-4), T10/1731- D, for presentation by the REQUEST SENSE command (see Seagate SCSI Command Reference Manual, Part number 100293068). The proper sense data shall be presented when a SCSI status byte of Check Condi- tion is presented as specified by the SCSI Primary Commands-4 (SPC-4), T10/1731-D and this manual.

128 Parallel SCSI Interface Product Manual, Rev. A