DatacenterDisk

WD 18TB SATA Enterprise HDD - Prices

16 drives tracked. From $28.33/TB. Updated about once a day.

Buy or Skip?
✓ Buy if: you want 25% below-average pricing on 18TB WD drives. These are datacenter pulls - verify SMART data on arrival.
✗ Skip if: you require new-only drives for production RAID or need guaranteed OEM warranty - consider new alternatives.
Buy on Amazon $510.00
Best $/TB
$28.33
Drives
14
Condition
New + Refurb

At $28.33/TB, WD 18TB SATA drives are $7.30/TB cheaper than the 18TB SATA category average of $35.63/TB — strong value at this capacity.

WD 18TB SATA - worth it?

WD 18TB SATA drives include the Ultrastar DC enterprise line and Red Pro NAS series. Both use CMR recording and carry 5-year warranties. From $28.33/TB.

Condition
Capacity
13 of 13 part numbers (14 offers)
  • $28.33/TB$510.00
    WD Purple 18TB WD180PURZ
    WD180PURZ
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $28.89/TB$519.99
    WD DC HC550 18TB SATA 512MB Enterprise
    WUH721818ALE6L4
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $29.25/TB$526.49
    WD Purple Pro 18TB WD181PURP
    WD181PURP
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $33.33/TB$599.99
    WD Ultrastar 18TB SATA
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $33.33/TB$599.99
    WD Ultrastar 18TB SATA
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $33.33/TB$599.99
    WD Gold 18TB
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $34.39/TB$619.00
    WD Red Pro 18TB WD181KFGX
    WD181KFGX
    18TB · SATA-6G · 2 offers
    Refurb
    Buy on Amazon
  • $36.61/TB$659.00
    WD Gold 18TB
    18TB · SATA-6G
    Refurb
    Buy on Amazon
  • $41.94/TB$754.99
    WD Red Pro 18TB WD181KFGX
    WD181KFGX
    18TB · SATA-6G
    New
    Buy on Amazon
  • $43.58/TB$784.45
    WD DC HC550 18TB SATA 512MB Enterprise
    WUH721818ALE6L4
    18TB · SATA-6G
    New
    Buy on Amazon
  • $45.00/TB$809.99
    WD Purple Pro 18TB WD181PURP
    WD181PURP
    18TB · SATA-6G
    New
    Buy on Amazon
  • $47.22/TB$850.00
    WD Gold 18TB
    18TB · SATA-6G
    New
    Buy on Amazon
  • $60.50/TB$1,089.00
    WD Purple 18TB WD180PURZ
    WD180PURZ
    18TB · SATA-6G
    New
    Buy on Amazon

Guides for this capacity: best 18TB hard drive · the HDD price forecast · fill a NAS at today's prices

Other WD SATA capacities

1TB2TB3TB4TB6TB8TB10TB12TB14TB16TB18TB20TB22TB24TB

Other brands at 18TB SATA

MDDToshibaWD

Frequently Asked Questions

14 in-stock listings out of 16 tracked; the cheapest is the WD WD Purple 18TB WD180PURZ at $510.00 ($28.33/TB). The table on this page is the live ranking.

Both are in stock: 5 new and 9 recertified or used. The cheapest new is the WD WD Red Pro 18TB WD181KFGX at $754.99, the cheapest recertified or used the WD WD Purple 18TB WD180PURZ at $510.00 - a 32% shelf gap between two different models, not a like-for-like discount. New carries the manufacturer's warranty; recertified a reseller's.

8 of the 16 tracked listings carry a manufacturer-sourced conventional (CMR/ePMR) recording value, including the WD Ultrastar DC HC550 18TB SATA and the WD DC HC550 18TB SATA 512MB Enterprise. 8 are not sourced either way - an unsourced drive is never assumed CMR here.

Use Case Scenarios

🏠
Home & SMB NAS
Building a high-capacity NAS for media, backups and file sharing.
✓ Excellent fit
Verify CMR recording before using in RAID. Refurb units offer strong value for non-critical NAS.
💾
Backup Server / Veeam Target
Dedicated backup storage for Veeam, Commvault, or NetBackup.
✓ Excellent fit
18TB SATA drives are ideal for backup targets. SATA gives maximum $/TB for backup repositories.
☁️
Object Storage / Cold Data Tier
High-density storage for MinIO, Ceph or Hadoop at scale.
✓ Excellent fit
At 18TB per drive, a 60-bay JBOD delivers 1080TB raw — enough for petabyte-scale object storage.

Maintenance & Troubleshooting

Maintenance Checklist

On installCheck SMART baseline on arrival
Run smartctl -a /dev/sdX and record: Reallocated_Sector_Ct, Power_On_Hours, Spin_Retry_Count. Critical for refurb drives — refuse any with reallocated sectors > 0.
MonthlyRun SMART short self-test
smartctl -t short /dev/sdX — takes 1-2 minutes, catches most developing issues. Schedule during off-peak.
QuarterlyRun SMART long self-test
smartctl -t long /dev/sdX — full surface scan, takes 9 hours for 18TB. Any test failure is grounds for immediate replacement.
QuarterlyCheck RAID array health
Verify no degraded drives. A degraded array with no hot spare is one failure from data loss. Check mdstat or controller UI.
AnnuallyVerify drive firmware version
Check WD support site for firmware updates. Some versions have known bugs affecting integrity.
Every 3-5 yearsPlan proactive replacement
Enterprise HDDs have higher failure rates after year 4-5. At 18TB per drive, budget for replacements before failures occur.

Troubleshooting Guide

Cause: Loose SATA data or power cable, failed port, or drive not spinning up.
Fix: Reseat both cables. Try a different port. Listen for spin-up sound. Test with a known-good cable.