NAS Hard Drive
Seagate Exos X24 24 TB (ST24000NM002H)Backblaze
The Seagate Exos X24 ST24000NM002H is a 24 TB NAS-class hard drive aimed at Datacenter, Pro. It spins at 7200 RPM with 512 MB of cache and carries a 5-year warranty. On this page you get the complete manufacturer specification, what the drive delivers inside common RAID levels, its measured or rated reliability, and where to buy it — all cross-checked against the datasheet.
| Capacity | 24 TB |
| Rotational speed | 7200 RPM |
| Cache | 512 MB |
| Interface | SATA 6Gb/s |
| MTBF | 2.5M h |
| URE rating | 1 / 1015 |
| Power (idle / load) | 5.9 / 8.0 W |
| Noise (idle / seek) | 30 / 34 dB |
| Workload rating | 550 TB/yr |
| Warranty | 5 years |
| Use cases | DatacenterPro |
Four of these 24 TB drives in RAID 5 give you 72 TB usable and survive one failure; the same four in RAID 6 give 48 TB and survive two. With drives this size, a rebuild reads every surviving disk end to end — the larger the drive, the stronger the case for double parity. Model your own drive count and level in the calculator.
Open in the RAID calculator →This model is not yet in the Backblaze Drive Stats public dataset, so no independent field failure rate is available. The manufacturer specifies an MTBF of 2.5M h and a 550 TB/yr workload rating — both signals that it is built for the sustained duty of a NAS rather than a desktop.
Is the Seagate Exos X24 24 TB a good NAS drive?
Yes — it is a 7200 RPM NAS-class drive rated for 550 TB/yr of writes per year with a 5-year warranty, which puts it firmly in NAS-duty territory rather than desktop use. Suitability depends on your bay count and RAID level; use the RAID calculator to check usable capacity and rebuild risk for your setup.
How much usable space do I get from 24 TB drives in RAID 5?
With four 24 TB drives, RAID 5 yields 72 TB usable (capacity of three drives) and survives one failure; RAID 6 yields 48 TB and survives two. More drives raise both the usable total and the rebuild risk — the calculator computes the exact figures for any count.
What is the failure rate of the Seagate Exos X24 24 TB?
This model is not yet in the public Backblaze Drive Stats dataset, so no independent field AFR exists. The manufacturer rates it at an MTBF of 2.5M h and 550 TB/yr annual workload — both NAS-grade figures.