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Product Code: UDHO-4209
MPN #: WD181KFGX 4 PACK
Product Condition: New
Running out of reliable storage for your growing business data can halt productivity and risk loss. The Western Digital WD Red Pro (WD181KFGX 4 PACK) 18TB 7200RPM 3.5" SATA Hard Drive is a high-capacity, 24×7 hard drive designed for commercial NAS systems, giving you the space and endurance you need to keep files accessible around the clock.
Ideal for multi-bay NAS units in offices, creative studios or small data centres, this hard drive stores large media libraries, backups, and collaborative project files, ensuring smooth access for many users throughout the workday.
Choosing this drive means you get enterprise-class performance without the complexity of a server-grade system. The integrated NASware™ technology fine-tunes the drive for NAS workloads, improving both speed and reliability, so you experience fewer bottlenecks when multiple users access files simultaneously. Its helium-filled design reduces friction and power consumption, helping keep operating costs low while maintaining a quiet environment.
The drive also features OptiNAND™ flash for housekeeping tasks, freeing up more of the 18 TB for your actual data. With a 2.5 million-hour MTBF and low non-recoverable error rate, you can trust that critical information remains safe over the long term, making it a solid foundation for any growing storage infrastructure.
| Miscellaneous | |
| Miscellaneous / MTBF | 2,500,000hours |
| Storage | |
| Storage / Type | Hard drive |
| Header | |
| Header / Product Line | WD Red Pro |
| Header / Packaged Quantity | 4 |
| Dimensions & Weight | |
| Dimensions & Weight / Height | 1in |
| Dimensions & Weight / Width | 4in |
| Dimensions & Weight / Depth | 5.8in |
| Dimensions & Weight / Weight | 24.34oz |
| Environmental Parameters | |
| Environmental Parameters / Min Operating Temperature | 32 °F |
| Environmental Parameters / Max Operating Temperature | 149 °F |
| Environmental Parameters / Min Storage Temperature | -40 °F |
| Environmental Parameters / Max Storage Temperature | 158 °F |
| Environmental Parameters / Shock Tolerance (non-operating) | 250 g @ 2 ms |
| Environmental Parameters / Shock Tolerance (operating) | 50 g @ 2 ms |
| Environmental Parameters / Sound Emission | 20 dBA |
| General | |
| General / Capacity | 18 TB |
| General / Depth | 5.8 in |
| General / Buffer Size | 512 MB |
| General / Width | 4 in |
| General / Weight | 24.34 oz |
| General / Interface | SATA 6Gb/s |
| General / Device Type | Hard drive - internal |
| General / Form Factor | 3.5" |
| General / Features | 24x7 continuous operation, Advanced Format technology, Conventional magnetic recording (CMR), Native Command Queuing (NCQ), Rotational Vibration (RV) sensor, Multi-axis shock sensor, Dynamic fly height technology, Error Recovery Control, workload up to 550 TB per year, NASware technology, Helium technology |
| General / Height | 1 in |
| Expansion & Connectivity | |
| Expansion & Connectivity / Interfaces | 1 x SATA 6 Gb/s |
| Expansion & Connectivity / Compatible Bay | 3.5" |
| Performance | |
| Performance / Drive Transfer Rate | 600 MBps (external) |
| Performance / Spindle Speed | 7200 rpm |
| Performance / Internal Data Rate | 272 MBps |
| Reliability | |
| Reliability / 24x7 Operation | Yes |
| Reliability / MTBF | 2,500,000 hours |
| Reliability / Non-Recoverable Errors | 10 per 10^15 |
| Reliability / Load / Unload Cycles | 600,000 |
| Hard Drive | |
| Hard Drive / Internal Data Rate | 272MBps |
| Hard Drive / Form Factor | 3.5" |
| Hard Drive / Non-Recoverable Errors | 10 per 10^15 |
| Hard Drive / Spindle Speed | 7200rpm |
| Hard Drive / Interface | Serial ATA-600 |
| Hard Drive / Form Factor (Short) | 3.5" |
| Hard Drive / 24x7 Operation | Yes |
| Hard Drive / Form Factor (Short) (metric) | 8.9 cm |
| Hard Drive / Capacity | 18TB |
| Hard Drive / Data Transfer Rate | 600MBps |
| Hard Drive / Buffer Size | 512MB |
| Hard Drive / Hard Drive Type | Internal hard drive |
| Hard Drive / Form Factor (metric) | 8.9 cm |
| Power | |
| Power / Power Consumption | 6.1 watt (read) ¦ 6.1 watt (write) ¦ 3.6 watt (idle) ¦ 0.9 watt (standby) ¦ 0.9 watt (sleep) |
| Summary Details | |
| HDD capacity | 18 TB |
| HDD speed | 7200 RPM |
| Storage drive buffer size | 512 MB |
| HDD size | 3.5" |
| Interface | Serial ATA |
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We are retiring PICOPC Products MNHO-073, MNHO-048 and MNHO-043 and they have reached EOL (End Of Life) as we are introducing new products with better technology. We would recommend you to look into MNHO-095. For Untangle, pfSense, OPNsense, Windows 11, Proxmox VE etc. we recommend MNHO-095 whereas for Sophos, Kerio Control and Endian, we would recommend MNHO-069. (A complete list of supported OS can be found in each product's listing)