These pre-owned Enterprise level drives was part of same Synology NAS. All drives are in excellent working condition.Each drive will be sold separately with discount if you buy multiple drives. All have been wiped clean, ready for next owner. See pictures for any addition details.Key Specifications

• Capacity: 18 TB
• Interface: SATA 6 Gb/s (also supports 3.0 Gb/s)
• Spindle Speed: 7,200 RPM
• Cache: 256 MB (multi-segmented)
• Form Factor: 3.5-inch
• Recording Technology: Conventional Magnetic Recording (CMR) with helium-sealed design
• Sector Sizes: Ships with FastFormat (512e/4Kn) — can be formatted to 4K native
• Max Sustained Transfer Rate: Up to 270 MB/s
• Random Read/Write IOPS (4K QD16): ~170 / 550
• Average Latency: 4.16 ms

Reliability & Endurance

• MTBF: 2.5 million hours
• Annualized Failure Rate (AFR): 0.35%
• Non-recoverable Read Errors: 1 sector per 10¹⁵ bits read

Power Consumption (Typical)

• Idle: ~5.3 W
• Operating (random read/write 4K QD16): ~9.4 W / ~6.4 W
• Power supply: +12 V and +5 V

Physical Dimensions

• Height: 26.1 mm max
• Width: 101.85 mm max
• Depth: 147 mm max
• Weight: ~670 g

Main Features

• Helium-sealed for lower power, lighter weight, and higher density.
• PowerBalance and PowerChoice technologies for optimized power/performance.
• Hot-plug support.
• Designed for hyperscale/cloud data centers, massive scale-out deployments, big data applications, high-density RAID, distributed file systems, enterprise backup, and surveillance.

This is a high-capacity enterprise drive optimized for large-scale storage environments. It performs best with good cooling and vibration management.
Disclaimer: Serial Numbers recorded. Item sold as is. Seller does not accept returns. Not responsible if not working. Not responsible for copyright infringement. Buyer is responsible for all copyright and legal issues and complaints.Buy at own risk. No seller warranty, No refunds, Not responsible if description or pictures are not accurate. Please inspect photos carefully as the details about the item(s) and its condition may not be listed in the description. Not responsible if damaged, or if lost in mail even if the item is insured. Not responsible if damaged in mail or transit. Not responsible to late or incorrect shipping dates, estimates, or times. May have cosmetic damage. Not responsible if condition of item(s) is incorrect or false. No responsible if part(s) missing. Anything not pictured is not included.