Fujitsu M2488 manual Loop Write to Read Check Condition Status, Hardware Error, Volume Overflow

TAPE UNIT SCSI COMMANDS M2488 PRODUCT GUIDE

Data is transferred in the mode selected by the MODE SELECT command.

4-3.11.2 LOOP WRITE TO READ CHECK CONDITION Status

This control unit implements both fixed-block and variable-block modes. If the Fixed bit is one and the current mode is variable (as set by MODE SELECT command or default power on condi- tion) the command is rejected with a CHECK CONDITION and a sense key of ILLEGAL REQUEST. If the Fixed bit is zero, the LWR command operates in variable block mode regardless of the current mode set by MODE SELECT.

If the LWR operation fails, CHECK CONDITION status is generated and the sense key is set to

HARDWARE ERROR.

4-3.11.3 LOOP WRITE TO READ Sense Keys

One of the following sense keys may be returned if a CHECK CONDITION was indicated:

SENSE KEY	CONDITION		DESCRIPTION
1h	RECOVERED ERROR	1. Recovery was performed when transferring data from the initia-
			tor.
		2.	Recovery was performed when writing buffered data to tape.
3h	MEDIUM ERROR	Writing buffered data to tape failed due to defective tape.
4h	HARDWARE ERROR	1. Transferring data from the initiator failed due to a hardware
			failure.
		2.	Writing buffered data to tape failed due to a hardware failure.
		3.	The loop write to read operation failed.
5h	ILLEGAL REQUEST	1. Reserved bit was found set in the CDB of the LWR command.
		2.	The Fixed bit was set to one, but the current mode is variable
			(as set by MODE SELECT or default power on condition).
		3.	The Flag bit was set but the Link bit was not set.
6h	UNIT ATTENTION	Indicates the LOOP WRITE TO READ command was not per-
		formed due to one of the following:
		1.	The tape cartridge may have been changed.
		2.	The target has been reset.
		3.	The Mode parameters have been changed by another initiator.
		4.	The version of the microcode has been changed (microcode
			downloaded).
		5.	A cartridge was loaded with a tape length that is too long or too
			short.
Bh	ABORTED COMMAND	LWR command was aborted.
Dh	VOLUME OVERFLOW	Buffered write data could not be written to tape because physical
		End-of-Tape has been reached.

4-50 CG00000-011503 REV. A April 1997