concurrent-positioning-range · shipping · also Concurrent Positioning Ranges log

Concurrent positioning range (ATA)

An ATA concurrent positioning range is a contiguous logical-block range reported as supporting positioning concurrently with other reported ranges.

Related Observatory article: Concurrent positioning range (ATA) on hesela.com

The Exos 2X18 SATA manual identifies the Concurrent Positioning Ranges log at address 47h and maps each half of its LBA space to an actuator. ATA logical-block counts must use the device's current logical-block size; Linux independent_access_ranges instead reports normalized 512-byte sectors. Do not substitute one unit for the other.

Relations

related

dual-actuator, independent-access-range, logical-sector, sata

Citations

1. Seagate Exos 2X18 SATA product manual, Rev. A, sections 2.2.1 and 2.2.2 (accessed 2026-10-16)
2. Linux 6.14 stable ABI: 512-byte independent access range units (accessed 2026-10-16)

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