Western Digital WUH721818ALE6L4 – 18TB 7200 RPM SATA 6Gb/s Ultrastar Enterprise Hard Drive
The Western Digital Ultrastar WUH721818ALE6L4 is an 18TB enterprise-class 3.5-inch hard drive built for capacity-optimized data center workloads such as object storage, cloud storage tiers, and large-scale backup targets. With a 7200 RPM spindle and SATA 6Gb/s interface, it offers cost-per-terabyte advantages over SSDs for sequential and mixed I/O workloads where high capacity matters more than sub-millisecond latency. Buyers should verify platform backplane and controller support for SED variants before deployment.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Capacity | 18 TB |
| Interface | SATA 6Gb/s |
| Form Factor | 3.5-inch |
| Spindle Speed | 7200 RPM |
| Cache | 512 MB |
| Technology | HelioSeal® (helium-filled for low power and high capacity) |
| MTBF | 2.5 million hours |
| Workload Rate Limit | Up to 550 TB/year |
| Encryption | Self-Encrypting Drive (SED) models supported |
| Vibration Protection | RAFF™ rotational vibration tolerance technology |
Good to know
- Uses the standard SATA 6Gb/s interface, so it drops into most server and JBOD enclosures without special HBAs; SED-based encryption requires a controller or software stack that supports self-encrypting drives.
- Within Western Digital’s portfolio, the Ultrastar line sits in the enterprise tier above IronWolf (NAS) and SkyHawk (surveillance), with a 550 TB/year workload rating and RAFF™ vibration tolerance aimed at dense multi-drive chassis.
- Confirm rack density and cooling for helium drives, and request SED/non-SED configuration and test data from your supplier before ordering volume shipments.
For tray and reel pricing, current stock by part number and date code, and volume discounts on bulk orders, request a bulk quotation.
The Western Digital Ultrastar WUH721818ALE6L4 is an 18TB enterprise-class 3.5-inch hard drive built for capacity-optimized data center workloads such as object storage, cloud storage tiers, and large-scale backup targets. With a 7200 RPM spindle and SATA 6Gb/s interface, it offers cost-per-terabyte advantages over SSDs for sequential and mixed I/O workloads where high capacity matters more than sub-millisecond latency. Buyers should verify platform backplane and controller support for SED variants before deployment.
Key specifications (table)
| Parameter | Specification |
|---|---|
| Capacity | 18 TB |
| Interface | SATA 6Gb/s |
| Form Factor | 3.5-inch |
| Spindle Speed | 7200 RPM |
| Cache | 512 MB |
| Technology | HelioSeal® (helium-filled for low power and high capacity) |
| MTBF | 2.5 million hours |
| Workload Rate Limit | Up to 550 TB/year |
| Encryption | Self-Encrypting Drive (SED) models supported |
| Vibration Protection | RAFF™ rotational vibration tolerance technology |
Good to know
- Uses the standard SATA 6Gb/s interface, so it drops into most server and JBOD enclosures without special HBAs; SED-based encryption requires a controller or software stack that supports self-encrypting drives.
- Within Western Digital’s portfolio, the Ultrastar line sits in the enterprise tier above IronWolf (NAS) and SkyHawk (surveillance), with a 550 TB/year workload rating and RAFF™ vibration tolerance aimed at dense multi-drive chassis.
- Confirm rack density and cooling for helium drives, and request SED/non-SED configuration and test data from your supplier before ordering volume shipments.
For tray and reel pricing, current stock by part number and date code, and volume discounts on bulk orders, request a bulk quotation.
