HP LTO 4 SAS Sense keys and codes, Sense keys-actions to take, Action, Console Message, page

6 Sense keys and codes

Sense keys—actionsto take

Ultrium drives follow the ANSI definition of sense keys. The following table explains how the drives interpret sense key descriptions.

As sense keys and additional sense codes are intended to be hierarchical errors, the table recommends action for the host when a particular sense key is reported.

For more detailed recovery actions, see “Additional sense codes—actions to take” on page 57.

Code	Sense Key		Interpretation
0h	NO SENSE		These are informational/positional codes. The additional sense
			codes are not generally considered errors; they usually indicate
			some condition (such as hitting a filemark). The tape positional
			codes are mandatory for all sequential access devices. This use
			complies with SCSI-2, so it is generic.
			For additional sense codes, see “0h—NO SENSE” on page 58.
		Action:	The host will know what to do with this information, depending
			upon the I/O operation at the time. Since the drive implements
			Progress Indication, this sense key may be returned if the drive is
			polled while an immediate operation is in progress.
			If CHECK CONDITION occurs with this sense key, and the additional
			sense code is not recognized by the host, the software should just
			log the occurrence and continue. It will not be considered an error.
			The I/O should have completed without an error.
1h	RECOVERED ERROR		These errors have been recovered by the drive. The drive may
			report any type of recovered error additional sense code.
			RECOVERED ERROR is returned is a MODE SELECT parameter is
			truncated or if a TapeAlert event is being reported.
			RECOVERED ERROR is the lowest priority sense key; it is only
			reported when the I/O has completed with no other type of CHECK
			CONDITION having occurred.
			For additional sense codes, see “1h—RECOVERED ERROR” on
			page 59.
	Console Message:		None

HP LTO Ultrium 4 drives technical reference manual, volume 2: software integration 53 HP restricted