List of common SCSI KCQs
| Category | Key | ASC | ASCQ | Error Condition |
|---|---|---|---|---|
| No Sense | 0 | 00 | 00 | No error |
| 0 | 5D | 00 | No sense - PFA threshold reached | |
| Soft Error | 1 | 01 | 00 | Recovered Write error - no index |
| 1 | 02 | 00 | Recovered no seek completion | |
| 1 | 03 | 00 | Recovered Write error - write fault | |
| 1 | 09 | 00 | Track following error | |
| 1 | 0B | 01 | Temperature warning | |
| 1 | 0C | 01 | Recovered Write error with auto-realloc - reallocated | |
| 1 | 0C | 03 | Recovered Write error - recommend reassign | |
| 1 | 12 | 01 | Recovered data without ECC using prev logical block ID | |
| 1 | 12 | 02 | Recovered data with ECC using prev logical block ID | |
| 1 | 14 | 01 | Recovered Record Not Found | |
| 1 | 16 | 00 | Recovered Write error - Data Sync Mark Error | |
| 1 | 16 | 01 | Recovered Write error - Data Sync Error - data rewritten | |
| 1 | 16 | 02 | Recovered Write error - Data Sync Error - recommend rewrite | |
| 1 | 16 | 03 | Recovered Write error - Data Sync Error - data auto-reallocated | |
| 1 | 16 | 04 | Recovered Write error - Data Sync Error - recommend reassignment | |
| 1 | 17 | 00 | Recovered data with no error correction applied | |
| 1 | 17 | 01 | Recovered Read error - with retries | |
| 1 | 17 | 02 | Recovered data using positive offset | |
| 1 | 17 | 03 | Recovered data using negative offset | |
| 1 | 17 | 05 | Recovered data using previous logical block ID | |
| 1 | 17 | 06 | Recovered Read error - without ECC, auto reallocated | |
| 1 | 17 | 07 | Recovered Read error - without ECC, recommend reassign | |
| 1 | 17 | 08 | Recovered Read error - without ECC, recommend rewrite | |
| 1 | 17 | 09 | Recovered Read error - without ECC, data rewritten | |
| 1 | 18 | 00 | Recovered Read error - with ECC | |
| 1 | 18 | 01 | Recovered data with ECC and retries | |
| 1 | 18 | 02 | Recovered Read error - with ECC, auto reallocated | |
| 1 | 18 | 05 | Recovered Read error - with ECC, recommend reassign | |
| 1 | 18 | 06 | Recovered data using ECC and offsets | |
| 1 | 18 | 07 | Recovered Read error - with ECC, data rewritten | |
| 1 | 1C | 00 | Defect List not found | |
| 1 | 1C | 01 | Primary defect list not found | |
| 1 | 1C | 02 | Grown defect list not found | |
| 1 | 1F | 00 | Partial defect list transferred | |
| 1 | 44 | 00 | Internal target failure | |
| 1 | 5D | 00 | PFA threshold reached | |
| Not Ready | 2 | 04 | 00 | Not Ready - Cause not reportable. |
| 2 | 04 | 01 | Not Ready - becoming ready | |
| 2 | 04 | 02 | Not Ready - need initialise command (start unit) | |
| 2 | 04 | 03 | Not Ready - manual intervention required | |
| 2 | 04 | 04 | Not Ready - format in progress | |
| 2 | 04 | 09 | Not Ready - self-test in progress | |
| 2 | 31 | 00 | Not Ready - medium format corrupted | |
| 2 | 31 | 01 | Not Ready - format command failed | |
| 2 | 35 | 02 | Not Ready - enclosure services unavailable | |
| 2 | 3A | 00 | Not Ready - medium not present | |
| 2 | 3A | 01 | Not Ready - medium not present - tray closed | |
| 2 | 3A | 02 | Not Ready - medium not present - tray open | |
| 2 | 3A | 03 | Not Ready - medium not present - loadable | |
| 2 | 3A | 04 | Not Ready - medium not present - medium auxiliary memory accessible | |
| 2 | 4C | 00 | Diagnostic Failure - config not loaded | |
| Medium Error | 3 | 02 | 00 | Medium Error - No Seek Complete |
| 3 | 03 | 00 | Medium Error - write fault | |
| 3 | 10 | 00 | Medium Error - ID CRC error | |
| 3 | 11 | 00 | Medium Error - unrecovered read error | |
| 3 | 11 | 01 | Medium Error - read retries exhausted | |
| 3 | 11 | 02 | Medium Error - error too long to correct | |
| 3 | 11 | 04 | Medium Error - unrecovered read error - auto re-alloc failed | |
| 3 | 11 | 0B | Medium Error - unrecovered read error - recommend reassign | |
| 3 | 14 | 01 | Medium Error - record not found | |
| 3 | 16 | 00 | Medium Error - Data Sync Mark error | |
| 3 | 16 | 04 | Medium Error - Data Sync Error - recommend reassign | |
| 3 | 19 | 00 | Medium Error - defect list error | |
| 3 | 19 | 01 | Medium Error - defect list not available | |
| 3 | 19 | 02 | Medium Error - defect list error in primary list | |
| 3 | 19 | 03 | Medium Error - defect list error in grown list | |
| 3 | 19 | 0E | Medium Error - fewer than 50% defect list copies | |
| 3 | 31 | 00 | Medium Error - medium format corrupted | |
| 3 | 31 | 01 | Medium Error - format command failed | |
| Hardware Error | 4 | 01 | 00 | Hardware Error - no index or sector |
| 4 | 02 | 00 | Hardware Error - no seek complete | |
| 4 | 03 | 00 | Hardware Error - write fault | |
| 4 | 09 | 00 | Hardware Error - track following error | |
| 4 | 11 | 00 | Hardware Error - unrecovered read error in reserved area | |
| 4 | 15 | 01 | Hardware Error - Mechanical positioning error | |
| 4 | 16 | 00 | Hardware Error - Data Sync Mark error in reserved area | |
| 4 | 19 | 00 | Hardware Error - defect list error | |
| 4 | 19 | 02 | Hardware Error - defect list error in Primary List | |
| 4 | 19 | 03 | Hardware Error - defect list error in Grown List | |
| 4 | 32 | 00 | Hardware Error - no defect spare available | |
| 4 | 35 | 00 | Hardware Error - enclosure services failure | |
| 4 | 35 | 01 | Hardware Error - unsupported enclosure function | |
| 4 | 35 | 02 | Hardware Error - enclosure services unavailable | |
| 4 | 35 | 03 | Hardware Error - enclosure services transfer failure | |
| 4 | 35 | 04 | Hardware Error - enclosure services refused | |
| 4 | 35 | 05 | Hardware Error - enclosure services checksum error | |
| 4 | 3E | 00 | Hardware Error - logical unit has not self configured yet | |
| 4 | 3E | 01 | Hardware Error - logical unit failed | |
| 4 | 3E | 02 | Hardware Error - timeout on logical unit | |
| 4 | 3E | 03 | Hardware Error - self-test failed | |
| 4 | 3E | 04 | Hardware Error - unable to update self-test log | |
| 4 | 44 | 00 | Hardware Error - internal target failure | |
| Illegal Request | 5 | 1A | 00 | Illegal Request - parm list length error |
| 5 | 20 | 00 | Illegal Request - invalid/unsupported command code | |
| 5 | 21 | 00 | Illegal Request - LBA out of range | |
| 5 | 24 | 00 | Illegal Request - invalid field in CDB (Command Descriptor Block) | |
| 5 | 25 | 00 | Illegal Request - invalid LUN | |
| 5 | 26 | 00 | Illegal Request - invalid fields in parm list | |
| 5 | 26 | 01 | Illegal Request - parameter not supported | |
| 5 | 26 | 02 | Illegal Request - invalid parm value | |
| 5 | 26 | 03 | Illegal Request - invalid field parameter - threshold parameter | |
| 5 | 26 | 04 | Illegal Request - invalid release of persistent reservation | |
| 5 | 2C | 00 | Illegal Request - command sequence error | |
| 5 | 35 | 01 | Illegal Request - unsupported enclosure function | |
| 5 | 49 | 00 | Illegal Request - invalid message | |
| 5 | 53 | 00 | Illegal Request - media load or eject failed | |
| 5 | 53 | 01 | Illegal Request - unload tape failure | |
| 5 | 53 | 02 | Illegal Request - medium removal prevented | |
| 5 | 55 | 00 | Illegal Request - system resource failure | |
| 5 | 55 | 01 | Illegal Request - system buffer full | |
| 5 | 55 | 04 | Illegal Request - Insufficient Registration Resources | |
| Unit Attention | 6 | 28 | 00 | Unit Attention - not-ready to ready transition (format complete) |
| 6 | 29 | 00 | Unit Attention - POR or device reset occurred | |
| 6 | 29 | 01 | Unit Attention - POR occurred | |
| 6 | 29 | 02 | Unit Attention - SCSI bus reset occurred | |
| 6 | 29 | 03 | Unit Attention - TARGET RESET occurred | |
| 6 | 29 | 04 | Unit Attention - self-initiated-reset occurred | |
| 6 | 29 | 05 | Unit Attention - transceiver mode change to SE | |
| 6 | 29 | 06 | Unit Attention - transceiver mode change to LVD | |
| 6 | 2A | 00 | Unit Attention - parameters changed | |
| 6 | 2A | 01 | Unit Attention - mode parameters changed | |
| 6 | 2A | 02 | Unit Attention - log select parms changed | |
| 6 | 2A | 03 | Unit Attention - Reservations pre-empted | |
| 6 | 2A | 04 | Unit Attention - Reservations released | |
| 6 | 2A | 05 | Unit Attention - Registrations pre-empted | |
| 6 | 2F | 00 | Unit Attention - commands cleared by another initiator | |
| 6 | 3F | 00 | Unit Attention - target operating conditions have changed | |
| 6 | 3F | 01 | Unit Attention - microcode changed | |
| 6 | 3F | 02 | Unit Attention - changed operating definition | |
| 6 | 3F | 03 | Unit Attention - inquiry parameters changed | |
| 6 | 3F | 04 | Unit Attention - component device attached | |
| 6 | 3F | 05 | Unit Attention - device identifier changed | |
| 6 | 3F | 06 | Unit Attention - redundancy group created or modified | |
| 6 | 3F | 07 | Unit Attention - redundancy group deleted | |
| 6 | 3F | 08 | Unit Attention - spare created or modified | |
| 6 | 3F | 09 | Unit Attention - spare deleted | |
| 6 | 3F | 0A | Unit Attention - volume set created or modified | |
| 6 | 3F | 0B | Unit Attention - volume set deleted | |
| 6 | 3F | 0C | Unit Attention - volume set deassigned | |
| 6 | 3F | 0D | Unit Attention - volume set reassigned | |
| 6 | 3F | 0E | Unit Attention - reported LUNs data has changed | |
| 6 | 3F | 0F | Unit Attention - echo buffer overwritten | |
| 6 | 3F | 10 | Unit Attention - medium loadable | |
| 6 | 3F | 11 | Unit Attention - medium auxiliary memory accessible | |
| 6 | 3F | 12 | Unit Attention - iSCSI IP address added | |
| 6 | 3F | 13 | Unit Attention - iSCSI IP address removed | |
| 6 | 3F | 14 | Unit Attention - iSCSI IP address changed | |
| 6 | 3F | 15 | Unit Attention - inspect referrals sense descriptors | |
| 6 | 3F | 16 | Unit Attention - microcode has been changed without reset | |
| 6 | 3F | 17 | Unit Attention - zone transition to full | |
| 6 | 3F | 18 | Unit Attention - bind completed | |
| 6 | 3F | 19 | Unit Attention - bind redirected | |
| 6 | 3F | 1A | Unit Attention - subsidiary binding changed | |
| 6 | 5D | 00 | Unit Attention - PFA threshold reached | |
| Data Protect | 7 | 20 | 02 | Access Denied - No Access Rights |
| 7 | 27 | 00 | Write Protect - command not allowed | |
| Aborted Command | B | 00 | 00 | Aborted Command - no additional sense code |
| B | 1B | 00 | Aborted Command - sync data transfer error (extra ACK) | |
| B | 25 | 00 | Aborted Command - unsupported LUN | |
| B | 3F | 0F | Aborted Command - echo buffer overwritten | |
| B | 43 | 00 | Aborted Command - message reject error | |
| B | 44 | 00 | Aborted Command - internal target failure | |
| B | 45 | 00 | Aborted Command - Selection/Reselection failure | |
| B | 47 | 00 | Aborted Command - SCSI parity error | |
| B | 48 | 00 | Aborted Command - initiator-detected error message received | |
| B | 49 | 00 | Aborted Command - inappropriate/illegal message | |
| B | 55 | 03 | Aborted Command - insufficient resources | |
| B | 4B | 00 | Aborted Command - data phase error | |
| B | 4E | 00 | Aborted Command - overlapped commands attempted | |
| B | 4F | 00 | Aborted Command - due to loop initialisation | |
| Other | E | 1D | 00 | Miscompare - during verify byte check operation |
| x | 05 | 00 | Illegal request | |
| x | 06 | 00 | Unit attention | |
| x | 07 | 00 | Data protect | |
| x | 08 | 00 | LUN communication failure | |
| x | 08 | 01 | LUN communication timeout | |
| x | 08 | 02 | LUN communication parity error | |
| x | 08 | 03 | LUN communication CRC error | |
| x | 09 | 00 | vendor specific sense key | |
| x | 09 | 01 | servo fault | |
| x | 09 | 04 | head select fault | |
| x | 0A | 00 | error log overflow | |
| x | 0B | 00 | aborted command | |
| x | 0C | 00 | write error | |
| x | 0C | 02 | write error - auto-realloc failed | |
| x | 0E | 00 | data miscompare | |
| x | 12 | 00 | address mark not found for ID field | |
| x | 14 | 00 | logical block not found | |
| x | 15 | 00 | random positioning error | |
| x | 15 | 01 | mechanical positioning error | |
| x | 15 | 02 | positioning error detected by read of medium | |
| x | 27 | 00 | write protected | |
| x | 29 | 00 | POR or bus reset occurred | |
| x | 31 | 01 | format failed | |
| x | 32 | 01 | defect list update error | |
| x | 32 | 02 | no spares available | |
| x | 35 | 01 | unspecified enclosure services failure | |
| x | 37 | 00 | parameter rounded | |
| x | 3D | 00 | invalid bits in identify message | |
| x | 3E | 00 | LUN not self-configured yet | |
| x | 40 | 01 | DRAM parity error | |
| x | 40 | 02 | DRAM parity error | |
| x | 42 | 00 | power-on or self-test failure | |
| x | 4C | 00 | LUN failed self-configuration | |
| x | 5C | 00 | RPL status change | |
| x | 5C | 01 | spindles synchronised | |
| x | 5C | 02 | spindles not synchronised | |
| x | 65 | 00 | voltage fault | |
| x | ≥80 | x | Vendor specific | |
| x | x | ≥80 | Vendor specific |
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