Fujitsu M2488 manual Reserve Unit Sense Keys, Sense KEY Condition Description

TAPE UNIT SCSI COMMANDS M2488 PRODUCT GUIDE

Superseding reservations. An initiator that currently has a logical unit reserved may modify the current reservation by issuing another RESERVE UNIT command to the same logical unit. The superseding reservation releases the current reservation if the superseding reservation request is granted. The current reservation is not modified if the superseding reservation request cannot be granted. If the superseding reservation cannot be granted because of conflicts with a previous res- ervation (other than the current reservation), then the target returns RESERVATION CONFLICT status.

4-3.25.3 RESERVE UNIT Sense Keys

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

SENSE KEY	CONDITION		DESCRIPTION
1h	RECOVERED ERROR	Recovery was performed while writing buffered data before the
		RESERVE UNIT occurred.
3h	MEDIUM ERROR	1. Write of buffered data failed due to a defective tape.
		2.	An attempt was made to write 36-track data on 18-track formatted
			medium.
4h	HARDWARE ERROR	Write of buffered data failed due to a hardware failure.
5h	ILLEGAL REQUEST	1. Reserved bit was found set in the CDB of the RESERVE UNIT
			command.
		2.	Initiator attempted to perform a third-party reservation for its own
			ID.
		3.	The Flag bit was set but the Link bit was not set.
6h	UNIT ATTENTION	Indicates the RESERVE UNIT command was not performed 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 down-
			loaded).
		5.	A cartridge was loaded with a tape length that is too long or too
			short.
Bh	ABORTED COMMAND	The RESERVE UNIT command was aborted.
Dh	VOLUME OVERFLOW	Write of buffered data prior to the RESERVE UNIT operation failed
		because physical End-of-Tape has been reached.

4-114 CG00000-011503 REV. A April 1997