Seagate
Seagate Cheetah NS ST3400755SSProduct 400 GB 3.5" SAS internal hard drive
- SLC
$23.99
0.00030561BTC
In stock
Seagate
Seagate Exos X20 ST18000NM003D 18TB 7200 RPM SATA 3.5in internal hard drive
An 18 TB 3.5-inch SATA drive with 7200 RPM, 256 MB cache and CMR recording for enterprise storage
- InterfaceSATA 6.0Gb/s
- Capacity18TB
- Recording TechnologyCMR
- RPM7200 RPM
- Cache256MB
- Average Latency4.16ms
- 18 TB capacity stores massive datasets in a single 3.5" drive
- 7200 RPM spindle speed delivers fast sequential throughput for enterprise workloads
- 256 MB cache accelerates random read and write operations
- CMR recording technology ensures consistent performance in RAID and NAS arrays
- Helium-sealed design lowers power consumption per terabyte
18TB CMR Enterprise Hard Drive
The Seagate Exos X20 ST18000NM003D is an 18TB 3.5-inch internal hard drive built for enterprise storage. It spins at 7200 RPM with a 256MB cache and uses the SATA 6.0Gb/s interface. CMR recording technology and a helium-sealed design support high-capacity workloads in standard drive bays.
Suited for NAS and Data-Center Arrays
This drive targets cloud storage, hyperscale deployments, and NAS systems such as Synology or QNAP. It handles big-data analytics, object storage, distributed file systems, and enterprise backup. Builders who need a smaller capacity or a different form factor should look elsewhere.
SATA 6.0Gb/s Interface Decides Compatibility
The single specification that determines fit is the SATA 6.0Gb/s interface. Your system or enclosure must provide a standard SATA data and power connection for this 3.5-inch drive to operate.
Highlights
- 18 TB capacity stores massive datasets in a single 3.5" drive
- 7200 RPM spindle speed delivers fast sequential throughput for enterprise workloads
- 256 MB cache accelerates random read and write operations
- CMR recording technology ensures consistent performance in RAID and NAS arrays
- Helium-sealed design lowers power consumption per terabyte
Specifications
| Brand | Seagate |
|---|---|
| Series | Exos X20 |
| Model | ST18000NM003D |
| Interface | SATA 6.0Gb/s |
| Capacity | 18TB |
| Recording Technology | CMR |
| RPM | 7200 RPM |
| Cache | 256MB |
| Average Latency | 4.16ms |
| Features | Market-leading 20TB 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 i |
| Usage | For Enterprise Storage |
| Form Factor | 3.5" |
| Height (maximum) | 26.10mm |
| Width (maximum) | 101.85mm |
| Length (maximum) | 147.00mm |
Questions about this item
Will the 3.5-inch form factor with 26.10mm height fit my standard desktop drive bay?
Yes, the drive measures 147.00mm long, 101.85mm wide and 26.10mm high, matching the standard 3.5-inch desktop bay dimensions.
What is the correct way to connect the SATA 6.0Gb/s interface, and what common mistake should I avoid?
Attach both the SATA data cable and the 15-pin SATA power connector; a frequent error is leaving the power cable unseated, which prevents the drive from spinning up.
The helium-sealed design and 2,500,000 MTBF rating suggest long life — what maintenance or replacement should I plan for?
No user-serviceable parts exist inside the sealed helium enclosure; monitor SMART attributes for reallocated sectors and replace the drive if the health indicators degrade.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
