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WD Ultrastar 4TB SATA WUS721204BLE6L4

WUS721204BLE6L4
Ultrastarnearline4TBSATA-6G3.5"
No current price
newNot available
Price updated
Price accurate as of Nov 14, 2026, 12:00 AM
No current offer

The WD Ultrastar 4TB SATA WUS721204BLE6L4 is a 4TB SATA-6G 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 4TB

6 in-stock listings · this listing has no current offer on Amazon · ranked by live cost per tb, refreshed about once a day

DriveCapacityInterfaceRecordingCondition$/TBPrice
WD Red Legacy 3TB WD30EFRX
WD30EFRX
3TBSATA-6G—REFURB$51.00$153Buy on Amazon
MDD 6TB SAS 12G 7200RPM
MD6TSAS12872E
6TBSAS-12G—REFURB$25.00$150Buy on Amazon
Seagate SkyHawk 6TB ST6000VX0023
ST6000VX0023
6TBSATA-6G—REFURB$28.33$170Buy on Amazon
WD Purple 6TB WD60PURZ
WD60PURZ
6TBSATA-6G—REFURB$28.33$170Buy on Amazon
Seagate BarraCuda 6TB ST6000DM003
ST6000DM003
6TBSATA-6G—REFURB$28.33$170Buy on Amazon
Seagate BarraCuda 2TB ST2000DM001
ST2000DM001
2TBSATA-6G—REFURB$29.95$60Buy on Amazon

Where this listing sits: every 4TB hard drive · 4TB SATA drives · WD 4TB SATA — each page is the live ranking for that slice of the catalogue.

Part number: WUS721204BLE6L4 — decoded, with sibling variants and the warranty check.

Same capacity, other options
DriveInterfaceCond$/TBPrice
Dell 012GYY 4TB SAS 6G RenewedSAS-6GRefurb$23.75$95.00Buy on Amazon
Dell 202V7 4TB SAS 6G Near LineSAS-6GRefurb$24.75$99.00Buy on Amazon
WD Purple 4TB WD40PURXSATA-6GRefurb$26.35$105.39Buy on Amazon
HGST HUS726040ALS210 4TB SAS 12GSAS-12GRefurb$28.45$113.81Buy on Amazon

All 4TB drives we track, ranked by cost per terabyte.

Model context

CMR or SMR? What we can and cannot source for this part number

Part of the WD line we track.

Quick Verdict

The WD Ultrastar 4TB SATA WUS721204BLE6L4 is a 4TB SATA-6G enterprise drive - Verify recording technology before use in RAID. New unit with full manufacturer warranty.

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Specifications

Capacity4TB
Form Factor3.5"
InterfaceSATA-6G
Recording Tech—
RPM7200
Cache256MB
Sector Size512e
Workload Rating—
Warranty—
ASINB0D1V4BWDV
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 4TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 4TB SATA-6G
#1Seagate IronWolf 4TB NAS ST4000VN006
$29.88/TB
#2WD Purple 4TB WD40PURX
$33.00/TB
#3WD Purple 4TB WD40PURZ
$37.50/TB
#4Seagate SkyHawk 4TB ST4000VX016
$37.50/TB
#5WD Ultrastar 4TB SATA WUS721204BLE6L4THIS DRIVE
Out of stock

Works in these NAS machines

Asustor (11 NAS series)
Vendor-listed
On Asustor's list as Ultrastar DC HA340 WUS721204BLE6L4

Resolved against manufacturer compatibility lists we read and dated, capped at 4. Vendor-listed means the manufacturer names this exact part number; fit-verified is our own check of form factor, interface and recording technology against a published requirement. Neither is a guess, and a drive the registry cannot resolve shows nothing here rather than a maybe. How compatibility actually works

Also appears in

SATA hard drives

Frequently Asked Questions

Not right now: Amazon shows no current offer for ASIN B0D1V4BWDV. The in-stock alternatives nearest its 4TB capacity are on this page, ranked by live price.

This listing (WUS721204BLE6L4, ASIN B0D1V4BWDV) carries no renewed, recertified, refurbished or pulled claim in its title, and Amazon reports it as new. On this site that is what "new" means: sold as factory-new.

Use Case Scenarios

🏠
Home & SMB NAS
Building a mid-range 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
4TB SATA drives are ideal for backup targets. SATA gives maximum $/TB for backup repositories.
🏗️
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. SATA is fine for single-host VM 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. 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 2 hours for 4TB. 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 4TB per drive, budget for replacements before failures occur.

Troubleshooting Guide

Cause: Loose SATA data or power cable, failed port, or drive not spinning up.
Fix: Reseat both cables. Try a different port. Listen for spin-up sound. Test with a known-good cable.