DatacenterDisk

MDD 20TB SAS Enterprise HDD - Prices

2 MDD 20TB SAS hard drives tracked. Updated about once a day.

Best $/TB
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Drives
0
Condition
Refurb

MDD 20TB SAS - should you buy?

MDD MaxDigitalData 20TB SAS drives offer some of the best $/TB in this capacity class with a 5-year warranty on new units. At competitive prices these are a strong choice for nearline RAID arrays and NAS deployments.

Condition
0 of 0 part numbers

    No seller we track has a MDD 20TB SAS drive in stock right now. That describes today's listings only - it says nothing about whether these models are discontinued. The tracked listings above return here when stock does.

    In stock now: other 20TB SAS drives

    1 in-stock listing · Live prices; the cheapest offer per drive. · ranked by live cost per tb, refreshed about once a day

    DriveCapacityInterfaceRecordingCondition$/TBPrice
    Seagate Exos X20 20TB SAS
    ST20000NM003D
    		20TBSAS-12G—REFURB$41.45$829Buy on Amazon

    Guides for this capacity: best 20TB hard drive · the HDD price forecast · fill a NAS at today's prices

    Drive Specifications

    Other MDD SAS capacities

    3TB6TB10TB18TB20TB22TB

    Other brands at 20TB SAS

    MDDSeagate

    Frequently Asked Questions

    None right now: all 2 tracked MDD 20TB SAS listings are out of stock. The table fills back in when an offer returns; nearby capacities are linked on this page.

    None of the 2 tracked listings (including the MDD 20TB SAS 12G 7200RPM Enterprise) has a manufacturer-sourced recording value yet, so this page states none - an unsourced drive is never assumed CMR.

    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. New drives come with full warranty.
    💾
    Backup Server / Veeam Target
    Dedicated backup storage for Veeam, Commvault, or NetBackup.
    ✓ Excellent fit
    20TB SAS drives are ideal for backup targets. Dual-port SAS suits dual-path backup infrastructure.
    ☁️
    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. Establishes baseline for future comparison.
    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: HBA not initialized, SAS expander issue, cable fault, or incompatible controller.
    Fix: Verify HBA firmware. Check SAS topology with sas2ircu or StorCLI. Test with known-good cable. Confirm drive is SAS not SATA.