DatacenterDisk

WD 12TB SAS Enterprise HDD - Prices

5 WD 12TB SAS hard drives tracked. Prices from $28.25/TB. Updated every 4 hours.

Buy or Skip?
✓ Buy if: you want 7% below-average pricing on 12TB WD drives. These are datacenter pulls - verify SMART data on arrival.
✗ Skip if: you require new-only drives for production RAID or need guaranteed OEM warranty - consider new alternatives.
Buy on Amazon → $339.00
Best $/TB
$28.25
Drives
5
Condition
New + Refurb

At $28.25/TB, WD 12TB SAS drives are $10.54/TB cheaper than the 12TB SAS category average of $38.79/TB — strong value at this capacity.

WD 12TB SAS - should you buy?

WD Ultrastar 12TB SAS drives are the reliability benchmark for enterprise HDD. Hyperscale datacenter pulls at $28.25/TB offer exceptional value.

$/TB ▲Brand / ModelCapInterfaceTechCacheSectorWtyPriceCond.90DBuy
👑$28.25
👑 Best
WD
Ultrastar 12TB SAS HUH721212AL5204
HUH721212AL5204
Refurb · CMR ·
12TB
SAS-12G
7,200 RPM
CMR—512e—$339.00REFURBBuy →Details▼
$28.33
✓ Great
WD
Ultrastar 12TB SAS HUH721212AL5200
HUH721212AL5200
Refurb · CMR ·
12TB
SAS-12G
7,200 RPM
CMR—512e—$340.00REFURBBuy →Details▼
$29.00
WD
Ultrastar 12TB SAS HUH721212AL4200
HUH721212AL4200
Refurb · CMR ·
12TB
SAS-12G
7,200 RPM
CMR—4Kn—$348.03REFURBBuy →Details▼
$29.08
WD
Ultrastar 12TB SAS HUH721212AL5205
HUH721212AL5205
Refurb · CMR ·
12TB
SAS-12G
CMR—512e—$349.00REFURBBuy →Details▼
$37.29
↑ High
WD
Ultrastar 12TB SAS HUH721212AL4201
HUH721212AL4201
CMR ·
12TB
SAS-12G
CMR—4Kn—$447.45newBuy →Details▼

Other WD SAS capacities

8TB10TB12TB14TB16TB

Other brands at 12TB SAS

HGSTHPSeagateTDSourcingWD

Frequently Asked Questions

WD Ultrastar SAS drives have among the lowest annualized failure rates in the industry. Widely deployed in hyperscale datacenters by Google, Microsoft, and Amazon.

Both are available. Refurbished WD SAS drives are typically low-hours datacenter pulls - excellent value for non-critical storage. New drives with full warranty are recommended for production RAID arrays.

RAID 6 is recommended for 12TB SAS drives. Rebuild times are moderate and dual parity protects against the second-drive failure that can occur during lengthy rebuilds.

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. Refurb units offer strong value for non-critical NAS.
💾
Backup Server / Veeam Target
Dedicated backup storage for Veeam, Commvault, or NetBackup.
✓ Excellent fit
12TB SAS drives are ideal for backup targets. Dual-port SAS suits dual-path backup infrastructure.
🏗️
Virtualization Host Storage
VM images and snapshots on Proxmox, VMware or Hyper-V.
~ Good fit
Suitable for VM storage where workloads are not IOPS-intensive. SAS dual-port suits HA cluster shared storage. Consider NVMe cache for latency-sensitive VMs.

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. Critical for refurb drives — refuse any with reallocated sectors > 0.
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 6 hours for 12TB. 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 WD 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 12TB 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.