DatacenterDisk

MDD 20TB SAS Enterprise HDD - Prices

2 MDD 20TB SAS hard drives tracked. Prices from $15.50/TB. Updated every 4 hours.

Buy or Skip?
✓ Buy if: you specifically need MDD at this capacity for compatibility. 5-year warranty included.
✗ Skip if: you need higher workload rating than 550TB/year.
Buy on Amazon → $309.99
Best $/TB
$15.50
Drives
2
Condition
New

At $15.50/TB, MDD 20TB SAS drives are $0.00/TB above the 20TB SAS category average of $15.50/TB.

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 $15.50/TB these are a strong choice for nearline RAID arrays and NAS deployments.

$/TB ▲Brand / ModelCapInterfaceTechCacheSectorWtyPriceCond.90DBuy
👑$15.50
~ Fair
MDD
20TB SAS 12G 7200RPM Enterprise
MDD20TSAS25672E
CMR · 5yr
20TB
SAS-12G
7,200 RPM
CMR256MB512e5yr$309.99new▲Buy →Details▼
👑$15.50
~ Fair
MDD
20TB SAS 12G 7200RPM Enterprise
MDD20TSAS25672E
CMR · 5yr
20TB
SAS-12G
7,200 RPM
CMR256MB512e5yr$309.99new▲Buy →Details▼

Drive Specifications

MDD 20TB SAS 12G 7200RPM Enterprise
MDD20TSAS25672E
$15.50/TB
$309.99 total
Capacity
20TB
Interface
SAS-12G
Form Factor
3.5"
Recording
CMR
RPM
7,200
Cache
256MB
Sector Size
512e
Workload
—
Warranty
5 years
MDD 20TB SAS 12G 7200RPM Enterprise
MDD20TSAS25672E
$15.50/TB
$309.99 total
Capacity
20TB
Interface
SAS-12G
Form Factor
3.5"
Recording
CMR
RPM
7,200
Cache
256MB
Sector Size
512e
Workload
—
Warranty
5 years

Other MDD SAS capacities

3TB6TB10TB18TB20TB22TB

Frequently Asked Questions

MDD 20TB SAS drives are enterprise-grade and designed for 24/7 datacenter operation. Check individual model specs for MTBF and workload ratings.

New MDD 20TB SAS drives are available with manufacturer warranty. Worth the premium for mission-critical deployments.

RAID 6 is strongly recommended for 20TB SAS drives. At this capacity, RAID 5 rebuild times exceed 24 hours - too risky for a single parity stripe. Use RAID 6 or RAID 60 for arrays of 12+ drives.

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.