Ultrastar DC HC550
Western Digital Ultrastar DC HC550 18TB 3.5" 7200 RPM SATA
18TB · 7,200 RPM · 512 MB · SATA
$400
1 store
CC $400 · NE $648 · WDS $975
Seagate Exos X18 18TB 3.5" 7200 RPM SATA
MPN ST18000NM000J UPC 763649138878
- Capacity
- 18TB
- Speed
- 7,200 RPM
- Cache
- 256 MB
- Interface
- SATA
- Form factor
- 3.5"
- Recording
- —
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$682.99
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Specifications
Drive
- Capacity
- 18TB
- Form factor
- 3.5"
- Interface
- SATA
- Speed
- 7,200 RPM
- Cache
- 256 MB
- Helium
- Yes
Use & reliability
- Made for
- Enterprise
- Warranty
- 1 years
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Full spec sheet from Newegg
- Model/Brand
- Seagate
- Model/Model
- ST18000NM000J
- Model/Series
- Exos X18
- Features/Usage
- For Enterprise Storage
- Performance/RPM
- 7200 RPM
- Features/Features
- Market-leading 18TB HDD offering the highest capacity available for more petabytes per rack Highly reliable performance with enhanced caching, making it the logical choice for cloud data center and massive scale-out data center applications Hyperscale SATA model tuned for large data transfers and low latency PowerBalance feature optimizes Watts/TB Maximize total cost of ownership savings through lower power and weight with helium sealed-drive design Proven helium side-sealing weld technology for added handling robustness and leak protection Digital environmental sensors to monitor internal drive conditions for optimal operation and performance Data protection and security - Seagate Secure features for safe, affordable, fast, and easy drive retirement Proven enterprise-class reliability backed by 2.5M-hr MTBF rating
- Performance/Cache
- 256MB
- Performance/Capacity
- 18TB
- Performance/Interface
- SATA 6.0Gb/s
- Dimensions/Form Factor
- 3.5"
- Dimensions/Width (maximum)
- 101.85mm
- Dimensions/Height (maximum)
- 26.10mm
- Dimensions/Length (maximum)
- 147.00mm
- Performance/Average Latency
- 4.16ms
- Performance/NAND Flash Memory Type
- Hard Drive
- Additional Information/First Listed on Newegg
- July 20, 2026
Full spec sheet from Bestbuy
- UPC
- 763649138878
- Brand
- Seagate
- Usage
- Backup, Enterprise/server
- Form Factor
- 3.5 in.
- Interface(s)
- SATA
- Product Name
- Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J) - OEM
- Product Width
- 5.79 inches
- Product Height
- 1.03 inches
- Product Weight
- 1.8 ounces
- Storage Capacity
- 18 gigabytes
- Warranty - Labor
- 1 year
- Warranty - Parts
- 1 year
- Storage Drive Type
- HDD
- Internal Or External
- Internal
- Product Compatibility
- Network Attached Storage (NAS), Server
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