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24TB 的密度账：一盘顶过去一个柜

企业存储的每 TB 成本由三件事决定：单盘容量、盘位利用率和重建效率。Seagate Exos X24 把 24TB 塞进标准 3.5 英寸盘位（10 盘片氦气密封、CMR），意味着一个 44 盘位节点就是 1.06 PB——同样机架空间里比 20TB 时代多出 20% 的容量，电费、制冷、交换端口一分不多花。这是 2026 年云规模容量层（对象存储、大数据、备份归档）的密度基准。

Core Specifications

属性	仕様
モデル	ST24000NM000C (SATA 512e) / ST24000NM002H (SATA ISE)
容量	24 結核 (CMR, 10-disk helium-sealed)
インタフェース / format	SATA 6 ギガビット/秒, 512e
Rotational speed	7,200 rpm
キャッシュ	512 MB
Max sustained transfer	285 MB/s
Workload rating	550 TB transferred per year
信頼性	MTBF 2,500,000 時間
フォームファクタ	3.5-インチ, helium-sealed

What Reviewers Measured

Seagate’s spec sheet is one thing; independent test data is what buyers should trust. StorageReview’s Exos X24 evaluation measured 4K random performance at 6,000 IOPS read and 1,763 IOPS write (中小規模企業) – strong figures for a 24TB helium drive – and the drive held steady throughput across their test suites. RealHardwareReviews re-tested the drive at 50/75/90% capacity fill and reported consistent performance as the drive fills – the behavior that matters in a production object store, where drives spend their lives mostly full.

4ランダムに (measured): ~6,000 IOPS read / ~1,763 IOPS write
Capacity-fill consistency: stable performance at 50-90% fill (per independent re-test)
Sustained transfer: 285 MB/s max (メーカー), confirmed in sustained-throughput testing

Sources: StorageReview (storagereview.com/review/seagate-exos-x24-24tb-hdd-review), RealHardwareReviews (Exos X24 capacity-fill re-test).

Seagate Exos X24 24TB enterprise hard drive — Exos X24: 24TB CMR helium drive in the standard 3.5-inch form factor.

Reliability for the Capacity Era

MTBF 2,500,000 時間 とともに 550 TB/year workload rating – sustained data-center duty, not desktop hours.
Full CMR – no shingled writes, random-write behavior stays classic for any array or SDS stack.
Helium-sealed 10-disk design – lower drag, stable pressure, consistent performance over life.
512e with SED (ISE) variant (ST24000NM002H) for at-rest encryption without extra hardware.

For comparison, の WD ウルトラスター DC HC580 (24結核) is the ePMR/OptiNAND alternative at the same capacity point – the two 24TB classes bracket the enterprise 3.5-inch tier in 2026.

Deploying 24TB Drives

In a フュージョンサーバー 5288 V7 (44 x 3.5-inch bays) また PowerEdge R760 (12 × 3.5インチ), the Exos X24 changes the capacity math – but 24TB drives also rebuild slower. Follow the distributed-storage playbook: dedicated backend fabric for recovery traffic, spare OSD slots budgeted, and rack-aware placement so one drive failure never cascades (see our distributed storage guide for the full design).

Buying FAQ

CMR or SMR? Full CMR – no shingling caveats, classic random-write behavior.
インタフェース? SATA 6Gb/s 512e; ISE (SED) variant available as ST24000NM002H.
Workload fit? Object storage, ビッグデータ, backup/archive, surveillance – 550 TB/year rated.
Measured performance? ~6,000 IOPS 4K read per StorageReview’s test.
Best-fit servers? Any 3.5-inch hot-swap bay: 44 in a 5288 V7, 12 in an R760.

Seagate Exos X24 drive side view from StorageReview review — Drive hardware as photographed in StorageReview’s Exos X24 evaluation.

Density Math: 24TB vs 20TB per Node

Node config	24TB Exos X24	20TB drives
44-bay node raw	1.06 PB	880 結核
10-node cluster raw	10.6 PB	8.8 PB
Per-bay capacity	+20%	baseline

The +20% per-bay capacity compounds across a cluster at the same rack, power and network budget – the density premium pays back in floor space, not just spec sheets.

Seagate Exos X24 drive product photo — Exos X24: drop-in 3.5-inch SATA drive for storage nodes and enterprise servers.

Building a PB-scale storage tier? As an authorized distributor we supply the Exos X24 with 5288 V7 nodes, matching cables and cluster design – factory-direct pricing, 3-年保証, global shipping and free density consultation. Contact us for a per-TB quote.