WD

WD Ultrastar DC SN655 15.36TB U.3

WUS5EA1A1ESP7E1
Ultrastar DC SN655oltpTLC15.36TBNVMe-PCIe4U.3
$123.63/TB
$1,899.00
newNot available
Price updated
Price accurate as of Sep 2, 2026, 11:01 PM
No current offer

The WD Ultrastar DC SN655 15.36TB U.3 is a 15.36TB NVMe-PCIe4 SSD 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 15.36TB

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

DriveCapacityCondition$/TBPrice
Seagate Nytro 5060 E3.S 15.36TB
XP15360SE70045
15.36TBNEW$382.75$5879Buy
Samsung PM9A3 7.68TB U.2 NVMe
MZQL27T6HBLA-00A07
7.68TBREFURB$353.64$2716Buy
Samsung PM9A3 7.68TB U.2 NVMe
MZQL27T6HBLA
7.68TBNEW$520.70$3999Buy
WD Ultrastar DC SN655 7.68TB U.3
WUS5EA176ESP7E1
7.68TBNEW$1131.51$8690Buy
Crucial T705 4TB PCIe 5.0 M.2
T705
4TBNEW$139.71$559Buy
Crucial T700 4TB Heatsink PCIe 5.0 M.2
T700
4TBNEW$186.25$745Buy
Before you buy: check the bay and the lanes

U.2 and U.3 drives need a backplane wired for NVMe or an adapter carrying PCIe lanes to the bay - a SAS backplane will not do it. Check your chassis supports NVMe in the slot you plan to use before ordering. NVMe drive prices and form factors

Same capacity, other options
DriveInterfaceCond$/TBPrice
Seagate Nytro 5060 E3.S 15.36TBNVMe-PCIe4New$382.75$5879.00Buy
Model context

Part of the WD line we track.

Quick Verdict

The WD Ultrastar DC SN655 15.36TB U.3 delivers enterprise NVMe performance at $123.63/TB. Suited to read-intensive cloud workloads and mixed enterprise applications. Verify U.2/U.3 backplane compatibility before ordering.

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Specifications

Capacity15.36TB
Form FactorU.3
InterfaceNVMe-PCIe4
Recording TechTLC
Sector Size
Workload Rating
DWPD
TBW28032TB
Warranty5 years
ASINB0D7X2Z542
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 15.36TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 15.36TB NVMe-PCIe4
#1Solidigm D5-P5316 15.36TB NVMe U.2
$117.19/TB
#2WD Ultrastar DC SN655 15.36TB U.3THIS DRIVE
$123.63/TB
#3Seagate Nytro 5060 E3.S 15.36TB
$382.75/TB

Frequently Asked Questions

The Ultrastar DC SN655 15.36TB U.3 is designed for mixed enterprise workloads including virtualization, databases and analytics.

The Ultrastar DC SN655 15.36TB U.3 uses a U.3 form factor with NVMe-PCIe4 interface. Compatible with servers featuring U.2 or U.3 backplanes including Dell PowerEdge, HPE ProLiant Gen10+, and Supermicro with appropriate NVMe backplane.

Endurance is measured in DWPD (Drive Writes Per Day). Check the manufacturer datasheet for this drive's specific endurance rating.

Use Case Scenarios

🗄️
OLTP Database Primary Storage
PostgreSQL, MySQL or Oracle requiring low latency and high IOPS.
✓ Excellent fit
NVMe delivers sub-200μs latency vs 5ms for HDD — a 25x improvement that directly reduces query response times. At 1 DWPD verify your daily write volume stays within endurance limits.
🤖
AI/ML Training & Inference
GPU server loading training datasets or serving inference at high throughput.
✓ Excellent fit
NVMe at 6,900MB/s eliminates storage bottlenecks when loading datasets to GPU memory. At 15.36TB you can store substantial model weights on a single drive.
💾
Bulk Cold Data Archive
Storing large volumes of infrequently accessed data.
✗ Not ideal
At ~$124/TB, NVMe costs 10x more than enterprise HDD for cold data. Unless you need fast retrieval, HDDs or LTO tape are far more cost-effective.

Maintenance & Troubleshooting

Maintenance Checklist

On installUpdate drive firmware
Check manufacturer website for latest firmware. Enterprise SSDs receive updates that fix performance and reliability issues.
On installEnable power loss protection verification
Enterprise NVMe drives have onboard capacitors for power loss protection. Verify in drive logs after first power cycle.
MonthlyCheck SMART/NVMe health attributes
Run nvme smart-log /dev/nvme0 (Linux). Monitor: Media_Errors, Available_Spare, Percentage_Used.
MonthlyMonitor write endurance consumption
Track Percentage_Used SMART attribute. At 80%+ consider planning replacement. At 15.36TB and 1 DWPD you have 28,704,768GB lifetime writes.
QuarterlyReview error logs in server BMC
Check iDRAC, iLO or IPMI logs for NVMe errors, PCIe link speed downgrades, or unexpected resets.

Troubleshooting Guide

Cause: PCIe slot not initialized, missing NVMe driver, BIOS not updated, or U.2 cable issue.
Fix: Check BIOS for NVMe in PCIe enumeration. Update server firmware. Reseat U.2 cable. Verify PCIe bifurcation if using adapter. Test in another slot.