MDD 18TB SAS Enterprise HDD - Prices

2 MDD 18TB SAS hard drives tracked. Updated about once a day.

Best $/TB
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Drives
0
Condition
Refurb

MDD 18TB SAS - should you buy?

MDD MaxDigitalData 18TB 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 18TB 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, nearest capacity to 18TB

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

    DriveCapacityInterfaceRecordingCondition$/TBPrice
    MDD 18TB SATA 7200RPM NAS
    MDD18TS25672NAS
    18TBSATA-6G—REFURB$28.33$510Buy on Amazon
    WD DC HC550 18TB SATA 512MB Enterprise
    WUH721818ALE6L4
    18TBSATA-6GEPMRREFURB$28.89$520Buy on Amazon
    MDD 18TB SATA 7200RPM 5yr Warranty
    MDD18TSATA25672E
    18TBSATA-6G—REFURB$28.89$520Buy on Amazon
    MDD 18TB SATA 7200RPM Enterprise
    MDD18TSATA25672E
    18TBSATA-6G—REFURB$30.56$550Buy on Amazon
    WD Red Pro 18TB WD181KFGX
    WD181KFGX
    18TBSATA-6GCMRREFURB$32.72$589Buy on Amazon
    WD Gold 18TB18TBSATA-6G—REFURB$33.33$600Buy on Amazon

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

    Drive Specifications

    Other MDD SAS capacities

    Other brands at 18TB SAS

    Frequently Asked Questions

    None right now: all 2 tracked MDD 18TB 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 18TB 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
    18TB 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 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. 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 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 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 18TB 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.