Fujitsu M2488 Sense Data, Error Code Sense Format, Error Code 70 Sense Format on current command

MAINTENANCE AND SERVICING M2488 PRODUCT GUIDE

8-3 SENSE DATA

The sense bytes, contained in the controller, indicate error, status, and statistical information about the controller or the drive. Error information is set in the sense bytes when the CHECK CONDITION status is reported as a completion status. The sense bytes are transmitted to an initiator by the REQUEST SENSE command.

8-3.1 Error Code Sense Format

An Error Code (EC) of 70h (sense byte 0 of 70h or F0h) indicates that the CHECK CONDITION sta- tus returned is a result of an error or exception condition on the command that returned the CHECK CONDITION status.

Error code 71h (sense byte 0 of 71h or F1h) indicates the CHECK CONDITION status returned is the result of an error or exception condition not related to the command that returned the CHECK CON- DITION STATUS (i.e., deferred error). After detecting a deferred error condition on a logical unit, the controller reports CHECK CONDITION status to the next initiator attempting to access that log- ical unit.

The following tables and text define the sense data and log data returned to the initiator in the data phase of the REQUEST SENSE command.

Table 8-1. Error Code 70 - Sense Format (on current command)

							BITS
BYTES	7		6	5		4		3	2	1	0
0	Valid		1	1		1		0	0	0	0
1					Segment Number (00h)
2	FMark		EOM	ILI		Rsvd			Sense Key
3-6						Information Bytes
7				Additional Sense Length = 24h
8-11			00000000h (SCSI-2 Command Specific Information Bytes)
12					Additional Sense Code
13				Additional Sense Code Qualifier
14						FRU Code (00h)
15	SKSV		C/D	Rsvd		Rsvd		BPV		Bit Pointer
16-	MSB					Field Pointer
17
											LSB
18					Format of additional sense
19						Host ERPA
20-43		Additional Sense Bytes as Defined by the Format Indicated in Byte 18.

8-4 CG00000-011503 REV. A April 1997