WUH721818ALE6L4
WD Ultrastar DC HC550 · 18TB
CMR
✓ RAID-safe (CMR)
£575
(£31.94/TB)
Best price at Amazon · UK
Last checked Oct 21, 2026 · Price and availability subject to change.
Specifications
- Capacity
- 18 TB
- Technology
- CMR
- TLER
- ✓
- Class
- Enterprise
- RPM
- 7200
- Cache
- 512 MB
- Noise (idle / seek)
- 20 / 36 dB
- Fill
- Helium
- Interface
- SATA
- Form factor
- 3.5"
- Data confidence
- High
Reliability
No large-scale failure-rate data - Backblaze tracks mostly datacenter-class drives, so consumer/SMR models rarely appear. Reliability rankings →
Warranty5 years
Rated workload550 TB/yr
MTBF2,500,000 hrs
Datacenter enterprise drive with the highest workload and vibration rating.
Manufacturer-rated specs (Manufacturer spec), not observed failure data.
Price history
UK · cheapest per day
£575 latest
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