Sony SDX-800V/R manual Eom Ili, Sksv, Cln, Mew

6.Command Specification													REQUEST SENSE
			Table 6-87: Error Codes 70h and 71h Sense Data Format
	Bit	7		6	5		4		3		2		1	0
	Byte
	0	Valid						Error	Code (70h or	71h)
	1						Segment Number
	2	File-mark		EOM	ILI		Reserved					Sense Key
	3	(MSB)					Information		Bytes
	6													(LSB)
	7					Additional Sense Length (14h)
	8	(MSB)				Command-Specific Information
	11													(LSB)
	12						Additional Sense Code
	13					Additional Sense Code Qualifier
	14					Field Replaceable Unit Code
	15	SKSV					Sense-Key Specific
	17
	18							Reserved
	19	(MSB)				Read/Write Data Error Counter
	21													(LSB)
	22	(MSB)					Remaining Tape
	25													(LSB)
	26			Reserved					CLN			Reserved		MEW
	27							Reserved

Valid: A valid bit of one indicates that the Information Bytes hold residual data as defined in the SCSI spec.

Error Code: A value of 70h indicates a current error, i.e. the report is associated with the most recently received command. A value of 71h indicates a deferred error, i.e. the report is associated with a previous command and is not as a result of the current command. No other values will be returned.

Segment Number: Contains the number of the current segment descriptor if the REQUEST SENSE command is in response to a COPY command. Otherwise this byte is ZERO.

File-mark:This bit indicates that the current command has read a File-mark or a Set-mark. Reporting of Set-marks is optional and indicated by the RSmk bit in the MODE SENSE/SELECT Device Configuration Parameter page.

EOM: An End-Of-Medium (EOM) bit of ONE indicates that an End-Of-Medium condition exists. This bit, when set, indicates that the drive is at or past the Logical Early Warning Point if the direction was forward, or that the command could not be completed because Beginning-Of-Partition was encountered if the direction was reverse. The drive will also set the Sense Key to NO SENSE and the Additional Sense Code Qualifier to either 04h for Beginning of Partition or 02h for End of Partition.

For WRITE type operations, the drive will return a CHECK CONDITION on any operation which occurs following detection of the Early Warning End-of-Partition marker. The EOM and Additional Sense Code fields will be set.

For READ type operations, the drive will not return a CHECK CONDITION until the drive encounters the physical End-of-Partition.

Note that at PHYSICAL End-of-Partition, a WRITE FILEMARK command will cause the command to terminate with a CHECK CONDITION and a sense key of VOLUME OVERFLOW.

ILI: This is the Incorrect Length Indicator bit, which indicates that the requested logical block length did not match the logical block length of the data on the medium. Only READ or VERIFY may cause this bit to be set.

Information Bytes: The conditions of these bytes will contain the differences (residue) of the requested length minus the actual length in either bytes, blocks, File-marks or Set-marks as determined by the command. (Negative values are indicated by two’s complement notation.) These bytes will be valid for all READ, WRITE, SPACE and VERIFY commands for which a CHECK CONDITION status has been generated. These bytes will be ZERO for MODE SELECT/SENSE, INQUIRY, READ BLOCK LIMITS and TEST UNIT READY commands.

6-88 SONY AIT-3Ex drive SDX-800V series Ver.1.1