The Dell 18 TB SAS 7.2K 3.5-inch Hard Drive is a high-capacity, enterprise-grade mechanical storage solution designed for demanding server and storage array environments. With a Serial Attached SCSI (SAS) 12 Gbps interface and 7,200 RPM rotational speed, this 3.5-inch LFF (Large Form Factor) drive delivers a balanced mix of large storage capacity, reliable performance, and compatibility with Dell PowerEdge and PowerVault systems. It’s ideal for bulk data storage, virtualization, backups, file servers, and high-density data workloads where speed, reliability, and uptime matter.
Models are available with Dell part numbers such as 400-BKZN, 400-BKZO, 400-BKZP, 400-BKZQ, C78YJ, 5HYG2, AB378816, etc., and many include a 512e advanced sector format and hot-plug support for easy maintenance.
18 TB Storage Capacity – Massive storage ideal for large datasets and backups.
7200 RPM Rotational Speed – Efficient balance of performance and power consumption.
SAS 12 Gbps Interface – High-speed enterprise interface for reliable data transfer.
3.5-inch Large Form Factor (LFF) – Fits standard server bays.
Hot-Plug Support – Enables replacement or upgrades without powering down (when supported by chassis/backplane).
Advanced Format (512e) – Improves compatibility with modern OS and storage systems.
Buffer/Cache (typically 512 MB) – Helps smooth read/write operations.
Average Latency ~4.16 ms – Typical for 7200 RPM enterprise drives.
Balanced Enterprise Use – Suitable for archive, backup, file services, and mixed enterprise workloads.
| Specification | Details |
|---|---|
| Product | Dell 18 TB SAS 7.2K 3.5in Hard Drive |
| Storage Capacity | 18 TB (18,000 GB) |
| Interface Type | SAS (Serial Attached SCSI) – 12 Gbps |
| Form Factor | 3.5 inch Large Form Factor (LFF) |
| Rotational Speed | 7,200 RPM |
| Sector Format | 512e (Advanced Format) |
| Cache/Buffer | ~512 MB (varies by part number) |
| Data Transfer Rate | Up to 12 Gbps |
| Hot-Plug Support | Yes (supported with hot-swap backplanes) |
| Average Latency | ~4.16 ms |
| Compatible Part Numbers | 400-BKZN, 400-BKZO, 400-BKZP, 400-BKZQ, C78YJ, 5HYG2, AB378816, etc. |
| Typical Compatibility | Dell PowerEdge & PowerVault servers/storage arrays supporting SAS 3.5" drives |
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