Western Digital 0F38459 Ultrastar DC HC550 18TB 3.5" 7200 RPM 512MB cache SATA internal hard drive
- Bare Drive
- SATA 6.0Gb/s
Western Digital
Enterprise-grade 3.5-inch hard drive stores 16TB at 7200 RPM with 512MB cache over SATA 6.0Gb/s
Options 16TB
The Western Digital Ultrastar DC HC550 is a 16 TB hard drive built for enterprise storage arrays and servers. It uses a standard 3.5-inch form factor and spins at 7200 RPM with a 512 MB cache. The drive employs conventional magnetic recording technology for broad compatibility with existing capacity-focused applications. It is suited for data centres that need high-density bulk storage on a proven platform.
The drive connects through a SATA 6.0 Gb/s interface, which caps sustained throughput well below the media transfer rate of the platters. Sequential reads and writes will saturate the link before the mechanical subsystem reaches its peak. Random I/O performance is constrained by rotational latency and the command overhead of the AHCI protocol. Systems that require higher queue depths or lower latency should evaluate a different interface technology.
Sixteen terabytes provides substantial space for archival workloads, backup targets and cold-tier object stores. The HelioSeal helium-filled design and energy-assisted magnetic recording help maintain reliability at this density. Workloads that demand sustained write bandwidth beyond the SATA bottleneck or sub-millisecond access times will exceed the practical limits of this drive class. Applications needing more capacity per slot must wait for higher-density models.
| Brand | WD |
|---|---|
| Series | Ultrastar DC HC550 |
| Model | 0F38462 (WUH721816ALE6L4) |
| Interface | SATA 6.0Gb/s |
| Capacity | 16TB |
| RPM | 7200 RPM |
| Cache | 512MB |
| Features | 18/16TB capacity in a standard 3.5-inch form factor CMR technology works with all capacity enterprise applications & environments Reliable, field-proven, 6th generation design Industry's first HDD with Energy-Assisted Magnetic Recording technology Industry's first Triple Stage Actuator HelioSeal design delivers outstanding power efficiency 2.5M hours (projected) MTBF rating Self-Encrypting Drive Options |
| Usage | For Enterprise Storage |
| Form Factor | 3.5" |
| Height (maximum) | 26.10mm |
| Width (maximum) | 101.60mm |
| Length (maximum) | 147.00mm |
| 配送重量 | 0.81 kg |
| 梱包サイズ | 224 × 152 × 74 mm |
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The 16TB model provides ample capacity for enterprise storage while using the same CMR technology and HelioSeal design as the 18TB variant.
The 7200 RPM spindle combined with 512MB cache sustains high sequential throughput for RAID arrays and heavy read-write workloads.
The SATA 6.0Gb/s link caps maximum transfer at the interface ceiling, so sustained rates depend on the drive's internal media speed rather than the bus.
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