native-command-queuing · shipping · also NCQ

Native Command Queuing

Native Command Queuing (NCQ) allows multiple tagged ATA commands to be outstanding so a supporting device can schedule their execution.

Linux's documented NCQ error path uses log page 0x10 to identify the failed tag, while other affected commands may be retried. In v6.12, attribution is conditional on a readable log, an active tag and the port state. Several recovery messages do not establish several independent device failures. NCQ is not a write-durability guarantee.

Relations

related

sata, ahci, io-timeout

Citations

1. Linux v6.12: libata device, NCQ and bus error documentation (accessed 2026-10-15)
2. Linux v6.12: ata_eh_analyze_ncq_error and failed-tag attribution (accessed 2026-10-15)
3. SATA link errors: what CRC flags, NCQ recovery and PHY counters prove (accessed 2026-10-15)

JSON: /data/terms/native-command-queuing.json