Seagate IronWolf Pro ST12000NT001 12TB specifications

Decimal capacity; formatting and RAID reduce available storage.

SATA, not SAS; 6 Gb/s is the interface ceiling.

DS2129.4 12TB column: 256 MB. 206815300A Table 2, merged row spanning ST16000NM000H and ST12000NT001: 512 MB (524,288 KB). 206815300B intro and Table 2 list 512 MB as a shared 24/20/16/12 TB row; Rev B changelog is only “Revised model numbers.” No public firmware/P-N bridge. Confirm the delivered label if cache size is decisive.

DS2129.4 12TB column: 270 MB/s OD. Rev A Table 2: 272 MiB/s (285 MB/s max) and 259 MiB/s (272 MB/s max). Rev B Table 2 drops MiB labels and prints 272 and 259 as MB/s; Table 4 groups 24/20/16/12 TB at 285 MB/s max. The MiB/MB pair in Rev A explains 272 vs 285 inside that manual; it does not prove DS 270 MB/s equals 285 MB/s. Values stay labeled by source.

Specified clean shutdown and normal startup conditions; recovery may take longer after unexpected power loss.

Manufacturer bay-count rating does not establish compatibility with every NAS.

Includes reads and writes; annualized by power-on hours. This is not a lifetime TBW allowance.

Availability depends on the NAS vendor and software.

Host/controller and enclosure must also support safe hot swap.

Population engineering rating under specified conditions; not expected service life of one drive. Manual section2.9 assumes8760 power-on hours/year,10–30°C drive-reported temperature, wet-bulb ambient≤26°C and specified workload/contamination limits; maximum operating temperature is not the MTBF rating condition.

Manual specification; not a measured failure rate.

Check serial number, seller and purchase country for the supplied drive.

Not available in every country; recovery is not guaranteed and does not replace a backup.

Datasheet nominal average. Manual workload-specific power tests differ; do not treat this as maximum PSU demand.

DS2129.4 12TB: 5.0 W average idle (no temperature in the cell). Rev B Table 6 shared 24/20/16/12 TB: 6.19 W Avg Idle at 35 °C, average of drives; Idle_A 6.20 W, Idle_B 4.03 W, Idle_C 3.00 W. Idle_B is not a clean match for 5.0 W. No measured 12TB result or revision bridge resolves the difference.

Allow for simultaneous spin-up across all installed drives.

Datasheet idle is measured in Idle 1. Not a promise of noise at your listening position. The manual reports sound power separately.

ISO 7779 A-weighted sound-power conditions, cover upwards. Do not equate bel sound power with room sound-pressure readings.

For these older models Rev B differs: 5–65 °C summary, then 60 °C maximum in section 2.6.1. Confirm the applicable revision before designing near a limit.

Operating and non-operating; maximum gradient 20% per hour.

Datasheet exact model column. Shared older manual states 40 g; avoid assuming the higher rating for a supplied revision.

Manual test spectrum; greater than 90% sequential/random-write throughput criterion.

Datasheet 10–500 Hz; manual test spectrum 2–500 Hz. These are reported with their source conditions.

DS2129.4 12TB typical 670 g. Rev B Table 2 12TB maximum 655 g. Typical above max is unresolved without a revision/P-N bridge.