SCSI Status Codes, Sense Keys, and Sense/Qualifier Code Pairs

This appendix contains tables listing SCSI Status Codes, SCSI Sense Keys, and a partial list of the most common SCSI Additional Sense Code/Qualifier Code Pairs. This information is used to interpret SCSI error messages.

Example A-1 shows a typical SCSI error message:

Example A-1 Typical SCSI Error Message

[+6708 72410001 002a9858 0:7] scsi disk: CHECK CONDITION 1 on disk 0:6:5:0
       Read of logical block 509856, count 128
       disk sd45a, block 254920, 65536 bytes
       Valid = 1, Error code = 0x70
       Segment number = 0x00, Filemark = 0, EOM = 0, ILI = 0
       Sense key = 0x6, "UNIT ATTENTION" 2
       Information = 0x00 0x07 0xc7 0xe4
[+6709 72410001 002a9a10 0:7] scsi disk:      Additional sense length = 0x0a
       Command-specific information = 0x00 0x00 0x00 0x00
       Additional sense = 0x29, Qualifier = 0x02 3
       Field replaceable unit code = 0xea
       SKSV = 1, C/D = 0, BPV = 0, Bit pointer = 0
       Field pointer = 0x0003

1	Status, with interpretation (`CHECK CONDITION`)
2	Sense key, with interpretation (`UNIT ATTENTION`).
3	Additional Sense and Qualifier, without interpretation.

The status and sense key are interpreted for you in the error message text. Table A-1: “SCSI Status Codes (complete list)” and Table A-2: “SCSI Sense Keys (complete list)” provide a complete listing of the SCSI Status Codes and the SCSI Sense Keys.

Each Additional Sense and its corresponding Qualifier Code require interpretation on your part. Use the two codes together to determine their meaning from Table A-3: “Most Common SCSI Additional Sense Code/Qualifier Pairs”.

In Example A-1, the Additional Sense Code (0x29) and Qualifier Code (0x02) together mean: “SCSI bus reset occurred.”

Table A-3 lists the most common Additional Sense Code/Qualifier Code Pairs. For a comprehensive list of all Additional Sense Code/Qualifier Code Pairs, go to:

http://www.t10.org/ftp/t10/drafts/spc2/spc2r20.pdf

Table A-1 SCSI Status Codes (complete list)

SCSI Status Code	Meaning
`0x00`	Good
`0x02`	Check condition
`0x04`	Condition met
`0x08`	Busy
`0x10`	Intermediate
`0x14`	Intermediate—condition met
`0x18`	Reservation conflict
`0x22`	Command terminated
`0x28`	Queue full

Table A-2 SCSI Sense Keys (complete list)

SCSI Sense Key	Meaning
`0`	No sense
`0x1`	Recovered error
`0x2`	Not ready
`0x3`	Medium error
`0x4`	Hardware error
`0x5`	Illegal request
`0x6`	Unit attention
`0x7`	Data protect
`0x8`	Blank check
`0x9`	Vendor-specific
`0xa`	Copy aborted
`0xb`	Aborted command
`0xc`	Equal
`0xd`	Volume overflow
`0xe`	Miscompare
`0xf`	Reserved

Table A-3 Most Common SCSI Additional Sense Code/Qualifier Pairs

SCSI Additional Sense Code	SCSI Qualifier Code	Meaning
`0x00`	`0x00`	No additional sense information
	`0x01`	Filemark detected
	`0x02`	End-of-partitions/medium detected
	`0x03`	Setmark detected
	`0x04`	Beginning of partition/medium detected
	`0x05`	End-of-data detected
	`0x06`	I/O process terminated
	`0x16`	Operation in progress
	`0x17`	Cleaning requested
`0x01`	`0x00`	No index/sector signal
`0x02`	`0x00`	No seek complete
`0x03`	`0x00`	Peripheral device write fault
	`0x01`	No write current
	`0x02`	Excessive write errors
`0x04`	`0x00`	Logical unit not ready, cause not reportable
	`0x01`	Logical unit in process of becoming ready
	`0x02`	Logical unit not ready, initializing command required
	`0x03`	Logical unit not ready, manual intervention required
	`0x04`	Logical unit not ready, format in progress
	`0x05`	Logical unit not ready, rebuild in progress
	`0x06`	Logical unit not ready, recalculation in progress
	`0x07`	Logical unit not ready, operation in progress
	`0x08`	Logical unit not ready, long write in progress
	`0x09`	Logical unit not ready, self-test in progress
`0x05`	`0x00`	Logical unit does not respond to selection
`0x0a`	`0x00`	Error log overflow
`0x0b`	`0x00`	Warning
	`0x01`	Warning - specified temperature exceeded
	`0x02`	Warning - enclosure degraded
`0x0c`	`0x00`	Write error
`0x11`	`0x00`	Unrecovered read error
	`0x01`	Read retries exhausted
	`0x08`	Incomplete block read
	`0x09`	No gap found
`0x12`	`0x00`	Address mark not found for ID field
`0x13`	`0x00`	Address mark not found for data field
`0x14`	`0x00`	Recorded entity not found
	`0x01`	Record not found
	`0x02`	Filemark or setmark not found
	`0x03`	End-of-data not found
	`0x04`	Block sequence error
`0x15`	`0x02`	Positioning error detected by read of medium
`0x16`	`0x00`	Data synchronization mark error
`0x16`	`0x01`	Data sync error - data rewritten
`0x1a`	`0x00`	Parameter list length error
`0x1b`	`0x00`	Synchronous data transfer error
`0x20`	`0x00`	Invalid command operation code
`0x21`	`0x00`	Logical block address out of range
`0x24`	`0x00`	Invalid field in cdb
`0x25`	`0x00`	Logical unit not supported
`0x26`	`0x00`	Invalid field in parameter list
	`0x01`	Parameter not supported
	`0x02`	Parameter value invalid
	`0x03`	Threshold parameters not supported
`0x27`	`0x00`	Write protected
	`0x01`	Hardware write protected
	`0x02`	Logical unit software write protected
	`0x03`	Associated write protect
	`0x04`	Persistent write protect
	`0x05`	Permanent write protect
	`0x06`	Conditional write protect
`0x28`	`0x00`	Not ready to ready change, medium may have changed
`0x29`	`0x00`	Power on, reset, or bus device reset occurred
	`0x01`	Power on occurred
	`0x02`	SCSI bus reset occurred
	`0x03`	Bus device reset function occurred
	`0x04`	Device internal reset
	`0x05`	Tranceiver mode changed to single-ended
	`0x06`	Tranceiver mode changed to LVD
`0x2a`	`0x00`	Parameters changed
	`0x01`	Mode parameters changed
	`0x02`	Log parameters changed
	`0x03`	Reservations Preempted
	`0x04`	Reservations released
	`0x05`	Registrations preempted
`0x2c`	`0x00`	Command sequence error
`0x30`	`0x00`	Incompatible medium installed
	`0x01`	Cannot read medium—unknown format
	`0x02`	Cannot read medium—incompatible format
	`0x03`	Cleaning cartridge installed
	`0x04`	Cannot write medium - unknown format
	`0x05`	Cannot write medium - incompatible format
	`0x06`	Cannot format medium - incompatible medium
	`0x07`	Cleaning failure
`0x31`	`0x00`	Medium format corrupted
`0x33`	`0x00`	Tape length error
`0x34`	`0x00`	Enclosure failure
`0x35`	`0x00`	Enclosure services failure
`0x39`	`0x00`	Saving parameters not supported
`0x3a`	`0x00`	Medium not present
	`0x01`	Medium not present - tray closed
	`0x02`	Medium not present - tray open
	`0x03`	Medium not present - loadable
	`0x04`	Medium not present - medium auxiliary memory accessible
`0x3b`	`0x00`	Sequential positioning error
	`0x01`	Tape position error at beginning-of-medium
	`0x02`	Tape position error at end-of-medium
	`0x0f`	End of medium reached
	`0x11`	Medium magazine not accessible
	`0x12`	Medium magazine removed
	`0x13`	Medium magazine inserted
	`0x14`	Medium magazine locked
	`0x15`	Medium magazine unlocked
	`0x16`	Mechanical positioning or changer error
`0x3e`	`0x01`	Logical unit failure
	`0x02`	Timeout on logical unit
	`0x03`	Logical unit failed self-test
`0x3f`	`0x01`	Microcode has been changed
`0x44`	`0x00`	Internal target failure
`0x45`	`0x00`	Select or reselect failure
`0x46`	`0x00`	Unsuccessful soft reset
`0x47`	`0x00`	SCSI parity error
	`0x01`	Data phase CRC error detected
	`0x02`	SCSI parity error detected during ST data phase
	`0x03`	Infromation unit iuCRC error detected
`0x48`	`0x00`	Initiator detected error message received
`0x50`	`0x00`	Write append error
	`0x01`	Write append position error
	`0x02`	Position error related to timing
`0x51`	`0x00`	Erase failure
`0x51`	`0x01`	Erase failure - incomplete erase operation detected
`0x52`	`0x00`	Cartridge fault
`0x53`	`0x00`	Media load or eject failed
	`0x01`	Unload tape failure
	`0x02`	Medium removal prevented
`0x5D`	`0x00`	Failure prediction threshold exceeded
	`0x10`	Hardware impending failure general hard drive failure
	`0x11`	Hardware impending failure drive error rate too high
	`0x12`	Hardware impending failure data error rate too high
	`0x13`	Hardware impending failure seek error rate too high
	`0x14`	Hardware impending failure too many block reassigns
	`0x15`	Hardware impending failure access times too high
	`0x16`	Hardware impending failure start unit times too high
	`0x17`	Hardware impending failure channel parametrics
	`0x18`	Hardware impending failure controller detected
	`0x19`	Hardware impending failure throughput performance
	`0x1a`	Hardware impending failure seek time performance
	`0x1b`	Hardware impending failure spin-up retry count
	`0x1c`	Hardware impending failure drive calibration retry count
	`0x32`	Data channel impending failure data error rate too high
	`0x42`	Servo impending failure data error rate too high
	`0x43`	Servo impending failure seek error rate too high
	`0xff`	Failure prediction threshold exceeded (false)

SCSI Status Codes, Sense Keys, and Sense/Qualifier Code Pairs

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