Key Code Qualifier: Difference between revisions

Revision as of 18:16, 27 March 2018

Latest revision as of 22:16, 9 December 2024

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{{Short description|Type of SCSI error code}}

{{redirect|KCQ|the radio station in Saginaw, Michigan|WKCQ}}

'''Key Code Qualifier''' is an error-code returned by a [[SCSI]] device.

When a SCSI [[SCSI target|target]] device returns a [[SCSI check condition|check condition]] in response to a [[SCSI command|command]], the [[SCSI initiator|initiator]] usually then issues a [[SCSI Request Sense Command|SCSI Request Sense command]]. This process is part of a SCSI protocol called [[SCSI contingent allegiance condition|Contingent Allegiance Condition]]. The target will respond to the Request Sense command with a set of [[SCSI Request Sense Command|SCSI sense data]] which includes three fields giving increasing levels of detail about the error:

*K - sense key - 4 bits, (byte 2 of Fixed sense data format)

*C - additional sense code (ASC) - 8 bits, (byte 12 of Fixed sense data format)

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|rowspan="36" valign="top"|Soft Error||1||01||00||Recovered Write error - no index

|-一会功夫好

|1||02||00||Recovered no seek completion

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|3||31||01||Medium Error - format command failed

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|rowspan="2423" valign="top"|Hardware Error||4||01||00||Hardware Error - no index or sector

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|4||02||00||Hardware Error - no seek complete

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|4||19||03||Hardware Error - defect list error in Grown List

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|4||31||00||Hardware Error - reassign failed

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|4||32||00||Hardware Error - no defect spare available

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|5||21||00||Illegal Request - LBA out of range

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|5||24||00||Illegal Request - invalid field in [[SCSI CDB|CDB]] (Command Descriptor Block)

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|5||25||00||Illegal Request - invalid LUN