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The Workhorse of the Exos Lineup: 20TB of Capacity-Dense SAS Storage With Proven Reliability
The Seagate Exos X20 20TB sits at the sweet spot of the enterprise HDD market: large enough for capacity-dense deployments, proven enough to trust with production data, and priced well below the 24TB flagships. と 7,200 RPM, 12Gb/s SAS dual-port connectivity, 2.5 million hours MTBF, and a 550 TB/year workload rating, the X20 is the drive that powers backup repositories, object storage (MinIO, セフ), and nearline archive tiers across thousands of data centers. It is the drive you order when you need 300 TB of reliable, redundant storage without paying the density premium for 24TB drives.
技術仕様
| パラメータ | 仕様 |
|---|---|
| 容量 | 20結核 (また: 14結核, 16結核, 18TB in X20 series) |
| フォームファクタ | 3.5-インチ LFF |
| インタフェース | SAS 12Gb/秒 (dual-port, full-duplex) |
| 回転速度 | 7,200 RPM |
| Recording Technology | CMR (Conventional Magnetic Recording) with TDMR (Two-Dimensional Magnetic Recording) heads |
| Cache Buffer | 256 MB |
| Sustained Transfer Rate | まで 285 MB/s |
| Average Latency | 4.16 ms |
| MTBF | 2,500,000 時間 |
| AFR | 0.35% (design target) |
| Workload Rate Limit | 550 TB/year |
| URE Rate | 1 sector per 10^15 bits |
| 力 (アイドル状態 / オペレーティング) | 4.8W / 7.0W |
| Sealing | Helium-sealed (HelioSeal) |
| RV Sensors | はい (Rotational Vibration sensor array) |
| セクタサイズ | 512e or 4Kn (selectable) |
| ショック (オペレーティング / Non-Op) | 40G / 200G |
| 物理的な | 147.0 バツ 101.85 バツ 26.1 んん, 680g |
| 温度 | 5C to 60C |
| 保証 | 5-年限定 (メーカー) |
X20 vs X24 vs 2X18 — Choosing the Right Exos
| 特徴 | X20 20TB | X24 24TB | 2X18 18TB (HAMR) |
|---|---|---|---|
| 容量 | 20結核 | 24結核 | 18結核 (dual-actuator, 2x 9TB) |
| Recording Tech | CMR + TDMR | CMR + TDMR | HAMR |
| Actuators | Single | Single | Dual (MACH.2) |
| Transfer Rate | 285 MB/s | 270 MB/s | 288 MB/s (dual ~570 MB/s) |
| Price per TB (relative) | 100 percent | ~95 percent | ~105 percent |
| こんな方に最適 | Proven capacity tier, バックアップ, object storage | Maximum density per bay | High-throughput sequential workloads |
Deployments Where the X20 Is the Right Drive
- Backup repository (Veeam/Commvault): 12x X20 in RAID 6 = 200 TB usable. Sequential write at 285 MB/s per drive. あ 100 TB backup completes in the overnight window.
- Object storage (MinIO, セフ): 24-drive node = 480 TB raw. Erasure coding (EC 8+4) delivers ~360 TB usable with strong fault tolerance. SAS dual-port adds path redundancy.
- Nearline archive: Compliance archives, media libraries, and cold data tiers where cost per terabyte and 24/7 reliability matter more than IOPS.
互換性のあるプラットフォーム
SAS 12Gb/秒, compatible with all Dell PowerEdge servers with SAS backplanes (R660, R760, R770, R860, R960), xFusion フュージョンサーバー V7, Lenovo Thinksystem. Works with PERC H730/H740/H750/H755/H965i, LSI/Broadcom 93xx/94xx/96xx SAS HBAs.
新川経由のソース
We supply Exos X20 drives with factory-direct pricing, 3-年保証, そして世界的な発送. Volume discounts for 20+ ドライブ.
