WD Ultrastar DC HC550 Enterprise HDD - 18TB
Brand: Western Digital | Category: Enterprise HDDs
SKU: WUH721818BALE6L4 | Part #: WUH721818BALE6L4 | MPN: WUH721818BALE6L4
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About the WD Ultrastar DC HC550 Enterprise HDD - 18TB
The WD Ultrastar DC HC550 Enterprise HDD - 18TB from Western Digital is enterprise-grade Enterprise HDDs hardware built for data centers. It features 18TB capacity, 3.5" form factor, SAS 12Gb/s interface, Read: 267 MB/s, Write: 267 MB/s speed. The Western Digital Ultrastar DC HC550 is a 18TB 3.5-inch enterprise-class hard disk drive engineered for demanding data center environments. Built on Western Digital's HelioSeal technology, the drive is hermetically sealed with helium to reduce internal air turbulence, enabling higher areal density, lower power consumption, and improved reliability compared to air-filled alternatives. The HC550 utilizes conventional magnetic recording (CMR) with nine platters and eighteen he Available in brand new condition. Western Digital enterprise hdds products are trusted by enterprises and data centers worldwide. Available from Omnixon Global. Contact our sales team to request a quote.
Technical Specifications
| Brand | Western Digital |
| Category | Enterprise HDDs |
| SKU | WUH721818BALE6L4 |
| Part Number | WUH721818BALE6L4 |
| Condition | New |
| Capacity | 18TB |
| Form Factor | 3.5" |
| Interface | SAS 12Gb/s |
| Speed | Read: 267 MB/s, Write: 267 MB/s |
| Manufacturer Part Number | WUH721818BALE6L4 |
| Capacity | 18TB |
| Form Factor | 3.5-inch |
| Interface | SATA 6Gb/s |
| RPM | 7200 RPM |
| Cache Buffer | 512MB |
| Recording Technology | CMR (Conventional Magnetic Recording) |
| Areal Density | Helium-sealed 9-platter design |
| Number of Platters | 9 |
| Number of Heads | 18 |
| MTBF | 2,500,000 hours |
| Annualized Failure Rate (AFR) | 0.35% |
| Workload Rate | 550TB/year |
| Power Consumption (Active Read/Write) | 7.2W |
| Power Consumption (Idle) | 5.0W |
| Operating Temperature | 0°C to 60°C |
| Vibration Compensation | Rotational Vibration (RV) sensors with dual-stage actuator |
| Encryption | Available in SED (Self-Encrypting Drive) variant |
| Sector Size | 512e |
| Dimensions | 101.85mm x 147mm x 26.1mm |
| Weight | 650g |
Frequently Asked Questions about WD Ultrastar DC HC550 Enterprise HDD - 18TB
What does the WD Ultrastar DC HC550 Enterprise HDD - 18TB do?
At 18TB, the WD Ultrastar DC HC550 Enterprise HDD - 18TB suits enterprise data-center storage tiers — all-flash arrays, hyperconverged storage pools (vSAN, Ceph), database backends, and high-throughput backup repositories. The SAS 12Gb/s interface is supported by major server platforms.
What are the headline specs of the WD Ultrastar DC HC550 Enterprise HDD - 18TB?
Key specifications for the WD Ultrastar DC HC550 Enterprise HDD - 18TB: capacity 18TB; form factor 3.5 inch; interface SAS 12Gb/s; new condition; drive media type HDD; storage form factor 3.5 inch; storage capacity 18TB; storage interface SAS 12Gb/s. Manufacturer part number WUH721818BALE6L4. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
Is the WD Ultrastar DC HC550 Enterprise HDD - 18TB compatible with my infrastructure?
The WD Ultrastar DC HC550 Enterprise HDD - 18TB uses a SAS 12Gb/s interface in a 3.5 inch form factor. It's compatible with server platforms that expose this interface — typical deployments include Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, and Supermicro SuperServer chassis. For specific vendor part-number compatibility, our team validates against the manufacturer support matrix.