MDD

MDD 20TB SAS 12G 7200RPM Enterprise

MDD20TSAS25672E
MDD EnterprisenearlineCMR20TBSAS-12G3.5"
$15.50/TB
$309.99
newNot available
Price updated
Price accurate as of Sep 3, 2026, 12:01 PM
No current offer

The MDD 20TB SAS 12G 7200RPM Enterprise is a 20TB SAS-12G HDD in new condition. It has no current offer on Amazon; the in-stock alternatives nearest its capacity are listed below.

In stock instead - nearest to 20TB

6 in-stock listings · this listing has no current offer on Amazon · ranked by live cost per tb, refreshed every few hours

DriveCapacityInterfaceRecordingCondition$/TBPrice
MDD 20TB SATA 7200RPM NAS
MD20TSATA25672NAS
20TBSATA-6GCMRREFURB$25.00$500Buy
MDD 20TB SATA 7200RPM NAS
MD20TS25672NAS
20TBSATA-6GCMRNEW$25.00$500Buy
WD Ultrastar 20TB SATA20TBSATA-6GCMRREFURB$27.50$550Buy
WD Ultrastar 20TB SATA WUH722020ALE604
WUH722020ALE604
20TBSATA-6GCMRREFURB$31.50$630Buy
WD Ultrastar 20TB SATA WUH722020ALE604
WUH722020ALE604
20TBSATA-6GCMRREFURB$31.50$630Buy
Seagate Exos X20 20TB
ST20000NM007D
20TBSATA-6GCMRREFURB$33.50$670Buy

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.

Before you buy: this is a SAS drive

SAS drives do not plug into a normal SATA motherboard port. You need a SAS host bus adapter or a backplane that speaks SAS - an LSI/Broadcom HBA in IT mode is the usual answer. A SATA drive will run on a SAS controller, but not the other way round. HBA and IT-mode guide

Same capacity, other options
DriveInterfaceCond$/TBPrice
MDD 20TB SATA 7200RPM NASSATA-6GRefurb$25.00$499.99Buy
MDD 20TB SATA 7200RPM NASSATA-6GNew$25.00$499.99Buy
WD Ultrastar 20TB SATASATA-6GRefurb$27.50$549.99Buy
WD Ultrastar 20TB SATA WUH722020ALE604SATA-6GRefurb$31.50$630.00Buy

All 20TB drives we track, ranked by cost per terabyte.

Model context

Part of the MDD line we track.

Quick Verdict

The MDD 20TB SAS 12G 7200RPM Enterprise is a 20TB SAS-12G enterprise drive at $15.50/TB - CMR recording makes it safe for all RAID levels and NAS deployments. New unit with full 5-year warranty.

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Specifications

Capacity20TB
Form Factor3.5"
InterfaceSAS-12G
Recording TechCMR
RPM7200
Cache256MB
Sector Size512e
Workload Rating
Warranty5 years
ASINB0D4P5Z9V9
Market context

We do not have enough in-stock comparators of this type today to place this price against the rest of the market. The category page below ranks everything we do have.

Where the wider market has moved

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.

Compare against every 20TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 20TB SAS-12G
#1MDD 20TB SAS 12G 7200RPM EnterpriseTHIS DRIVE
$15.50/TB
#2MDD 20TB SAS 12G 7200RPM Enterprise
$15.50/TB
#3Seagate Exos X20 20TB SAS
$43.05/TB

Frequently Asked Questions

Yes. The 20TB SAS 12G 7200RPM Enterprise uses CMR recording which is fully compatible with all RAID levels.

5-year manufacturer warranty.

Compatible with any server or workstation equipped with a SAS HBA or SAS backplane. Tested with Dell PowerEdge, HPE ProLiant, Supermicro and IBM System x platforms.

Use Case Scenarios

🏠
Home & SMB NAS
Building a high-capacity NAS for media, backups and file sharing.
✓ Excellent fit
CMR recording is RAID-safe and fully compatible with Synology, QNAP, TrueNAS and UnRAID. 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.