This drive is sold under the MDD (MaxDigitalData) label. Who is MDD? → — the trademark record, what the warranty covers, and the checks to run on arrival.
This is a refurbished or recertified listing
Recertified enterprise drives are pulled from datacentre fleets, tested and resold. They are usually the cheapest route to bulk capacity, and the risk is concentrated in the first weeks - so check SMART data the day it arrives rather than the day you need it. What recertified means · Refurbished warranty terms · Verify on arrival
The MDD 20TB SATA 7200RPM NAS is a 20TB SATA-6G enterprise drive at $32.00/TB - Verify recording technology before use in RAID. As a refurbished unit, run SMART diagnostics on arrival and verify power-on hours.
Against every other drive we have an in-stock price for today, this one is cheaper per tb than 70% of them (165 of 237). The cheapest we can currently buy is $14.99/TB; the middle of the market is $39.58/TB.
These are third-party figures about the retail market as a whole, quoted and dated. They are not our own measurements and they do not describe this specific drive.
Yes. At our last check it was $639.99 ($32.00 per terabyte at its 20TB capacity), sold renewed under ASIN B0BYTYLMZ1. Amazon sets the final price at checkout.
The listing's own title says "renewed" for the MD20TSATA25672NAS. That is the seller's claim; we store it verbatim and the warranty is the reseller's, not the manufacturer's.
Use Case Scenarios
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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
20TB 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 20TB per drive, a 60-bay JBOD delivers 1200TB 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 10 hours for 20TB. 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 MDD 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 20TB 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.