MDD

MDD 18TB SAS 12G 7200RPM Enterprise

MDD18TSAS25672E
MDD EnterprisenearlineCMR18TBSAS-12G3.5"
$21.67/TB
$389.99
newNot available
Price updated
Price accurate as of Sep 3, 2026, 10:31 AM
No current offer

The MDD 18TB SAS 12G 7200RPM Enterprise is a 18TB 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 18TB

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 18TB SATA 6G 7200RPM NAS
MD18TSATA25672NAS
18TBSATA-6GCMRREFURB$25.00$450Buy
MDD 18TB SATA 7200RPM NAS
MDD18TS25672NAS
18TBSATA-6GCMRREFURB$25.56$460Buy
MDD 18TB SATA 7200RPM Enterprise
MDD18TSATA25672E
18TBSATA-6GCMRREFURB$26.11$470Buy
WD WD Purple 18TB WD180PURZ
WD180PURZ
18TBSATA-6GREFURB$28.64$515Buy
WD DC HC550 18TB SATA 512MB Enterprise
WUH721818ALE6L4
18TBSATA-6GEPMRREFURB$28.89$520Buy
WD WD Red Pro 18TB WD181KFGX
WD181KFGX
18TBSATA-6GCMRREFURB$31.06$559Buy

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 18TB SATA 6G 7200RPM NASSATA-6GRefurb$25.00$449.99Buy
MDD 18TB SATA 7200RPM NASSATA-6GRefurb$25.56$459.99Buy
MDD 18TB SATA 7200RPM EnterpriseSATA-6GRefurb$26.11$469.99Buy
WD WD Purple 18TB WD180PURZSATA-6GRefurb$28.64$515.49Buy

All 18TB drives we track, ranked by cost per terabyte.

Model context

Part of the MDD line we track.

Quick Verdict

The MDD 18TB SAS 12G 7200RPM Enterprise is a 18TB SAS-12G enterprise drive at $21.67/TB - CMR recording makes it safe for all RAID levels and NAS deployments. New unit with full 5-year warranty.

Share:WhatsAppFacebookPost on X

Specifications

Capacity18TB
Form Factor3.5"
InterfaceSAS-12G
Recording TechCMR
RPM7200
Cache256MB
Sector Size512e
Workload Rating
Warranty5 years
ASINB0C35RT3JC
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 18TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 18TB SAS-12G
#1MDD 18TB SAS 12G 7200RPM Enterprise
$17.78/TB
#2MDD 18TB SAS 12G 7200RPM EnterpriseTHIS DRIVE
$21.67/TB
#3Toshiba MG09 18TB
$38.89/TB

Frequently Asked Questions

Yes. The 18TB 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
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.