Western Digital · Enterprise
WUH721816ALE6L4
Ultrastar DC HC550 16TB
SATA 6 Gb/s · 3.5-inch · CMR
Exact Amazon US product
$744.45
View on Amazon US ↗New listing · ASIN B0921PYS45
Price as of Oct 27, 2026 05:19 UTC
The Western Digital WUH721816ALE6L4 is a 16TB Ultrastar DC HC550 hard drive for server and enterprise storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | WUH721816ALE6L4 |
|---|---|
| Nominal capacity | 16 TB · 16000 GB |
| RPM | 7200 |
| Interface | SATA 6 Gb/s |
| Recording | CMR |
| Cache (MB) | 512 |
| Form factor | 3.5-inch |
| Sector format | 512e |
| Drive construction | Helium |
| Recording evidence | Manufacturer recording specification ↗ |
| Recording verified | 2026-10-02 |
| Power Disable Pin 3 | Not supported (legacy configuration) |
Source: Western Digital Ultrastar DC HC550 datasheet, pages 2. Reviewed 2026-09-07. Published specifications, not our benchmark results.
What the specifications mean
- CMR recording is specified for this exact model. Check enclosure support and workload limits before installing it in an array.
Before ordering
Match WUH721816ALE6L4, 16TB and SATA 6 Gb/s against the selected offer. Check your system’s exact-model compatibility list and the seller’s warranty and return terms.
Amazon US listings
Exact model matches on Amazon.com. A verified ASIN identifies the product; it does not guarantee current stock. Check the selected variant, condition and seller.
Amazon US · ASIN B0921PYS45
$744.45 · as of Oct 27, 2026 05:19 UTC
Amazon US · ASIN B08H1T666Y
$784.45 · as of Oct 27, 2026 05:19 UTC
Amazon US · ASIN B0CW3T1SKY
$459.99 · as of Oct 27, 2026 05:19 UTC
Amazon US · ASIN B08H1T666Y
$599.99 · as of Oct 27, 2026 05:19 UTC
Amazon US · ASIN B0921PYS45
$706.40 · as of Oct 27, 2026 05:19 UTC
Same-capacity alternatives with Amazon US links
These models share the drive type, interface class and capacity. Compare their specifications and your system requirements before choosing a replacement.
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Specifications & offers →View on Amazon US ↗ASIN B0H1NC62DB · Check price and conditionSeagate · IronWolf Pro
ST16000NE000
16TB · SATA 6 Gb/s · CMR
Specifications & offers →View on Amazon US ↗ASIN B07SJTST6T · Check price and conditionSeagate · Exos X18
ST16000NM000J
16TB · SATA 6 Gb/s · CMR
Compare with WUH721816ALE6L4 →View on Amazon US ↗ASIN B08JV7N6J1 · Check price and conditionWUH721816ALE6L4 questions answered
Is WUH721816ALE6L4 CMR or SMR?
The manufacturer lists CMR recording for WUH721816ALE6L4. Other models and capacities in the same family can differ.
What connection does WUH721816ALE6L4 need?
WUH721816ALE6L4 uses SATA 6 Gb/s and a 3.5-inch form factor. Match both with the computer, controller or enclosure. An M.2 slot, 2.5-inch bay and 3.5-inch bay are not interchangeable.
How much usable space does WUH721816ALE6L4 provide?
Its nominal capacity is 16000 GB, approximately 14901.2 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.