The Western Digital Ultrastar DC SN640 WUS4BB038D7P3E3 is a high-performance enterprise-class NVMe solid state drive designed for read-intensive cloud computing, virtualization, web hosting, content delivery, scale-out storage, and modern data center environments. Combining enterprise reliability with low-latency NVMe performance, the Ultrastar DC SN640 Series delivers consistent operation for mission-critical workloads.
Built with Western Digital BiCS4 96-Layer 3D TLC NAND Flash, this 3.84TB U.2 NVMe SSD utilizes a PCIe Gen 3.1 x4 NVMe 1.3 interface and delivers up to 3,100 MB/s sequential read speeds, up to 1,800 MB/s sequential write speeds, and up to 434,000 random read IOPS. Optimized for read-intensive (RI) workloads, the drive offers a balance of performance, endurance, and enterprise-grade data protection features.
The WUS4BB038D7P3E3 includes advanced enterprise technologies such as Power Loss Protection (PLP), End-to-End Data Path Protection, Hot-Swap Support, and Instant Secure Erase (ISE) for fast and secure drive retirement. With an endurance rating of 0.8 DWPD, 5,744.64 TBW, and a 2 million hour MTBF, this SSD is engineered for dependable long-term operation in enterprise environments.
Product Specifications
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Manufacturer: Western Digital (WD) / HGST
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Series: Ultrastar DC SN640
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Model Number: WUS4BB038D7P3E3
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Product Type: Enterprise Read Intensive NVMe SSD
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Capacity: 3.84TB (3,840GB)
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Form Factor: 2.5-inch U.2 (SFF-8639)
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Drive Height: 7mm
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Interface: PCIe Gen 3.1 x4
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Protocol: NVMe 1.3
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NAND Flash: WD BiCS4 96-Layer 3D TLC NAND
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Workload Class: Read Intensive (RI)
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Security Type: ISE (Instant Secure Erase)
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Hot Swappable: Yes
Performance
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Sequential Read Speed: Up to 3,100 MB/s
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Sequential Write Speed: Up to 1,800 MB/s
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Maximum Random Read (4K): Up to 434,000 IOPS
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Maximum Random Write (4K): Up to 65,000 IOPS
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Mixed Random Workload (70/30): Up to 157,000 IOPS
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Interface Transfer Rate: 4 GB/s
- Ultra-Low Latency Enterprise Performance
Reliability & Endurance
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Endurance Rating: 0.8 DWPD (Drive Writes Per Day)
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Total Bytes Written (TBW): 5,744.64 TB
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MTBF: 2 Million Hours
- Enterprise Data Center Reliability
- Power Loss Protection (PLP)
- End-to-End Data Path Protection
- Hot Plug / Hot Swap Support
- Instant Secure Erase (ISE)
Security Information
- This model is an ISE (Instant Secure Erase) drive.
- Not a Self-Encrypting Drive (SED).
- Does not support TCG Ruby authentication management.
- Provides instant cryptographic erase for secure drive retirement.
- SED versions are identified by model numbers ending in E4.
Compatible Dell PowerEdge Servers
- PowerEdge R640
- PowerEdge R650
- PowerEdge R6515
- PowerEdge R660
- PowerEdge R740xd
- PowerEdge R750
- PowerEdge R7515
- PowerEdge R7525
- PowerEdge R760
- PowerEdge R7625
- PowerEdge MX740c
- PowerEdge MX750c
- PowerEdge C6420
- PowerEdge C6520
Compatible HPE ProLiant Servers
- ProLiant DL360 Gen10
- ProLiant DL380 Gen10
- ProLiant DL325 Gen10 Plus
- ProLiant DL385 Gen10 Plus
- ProLiant DL360 Gen11
- ProLiant DL380 Gen11
- ProLiant DL560 Gen11
Compatible Lenovo ThinkSystem Servers
- ThinkSystem SR630 V2 / V3
- ThinkSystem SR650 V2 / V3
- ThinkSystem SR655
- ThinkSystem SR665
- ThinkSystem SD630 V2
- ThinkSystem SD650 V2
Compatible Cisco UCS Servers
- Cisco UCS C220 M5
- Cisco UCS C220 M6
- Cisco UCS C220 M7
- Cisco UCS C240 M5
- Cisco UCS C240 M6
- Cisco UCS C240 M7
Compatible Supermicro Platforms
- SYS-120U-TNR
- SYS-220U-TNR
- SYS-620U-TNR
- SYS-220BT-HNTR
- SYS-620BT-DNCSTR
- SYS-110C-FNR
- SYS-220C-TNRT
Compatibility Requirements
- Requires a native U.2 NVMe backplane or U.2 NVMe host adapter.
- Compatible with NVMe-enabled servers using SlimSAS or OCuLink connectivity.
- Not compatible with SATA-only backplanes.
- Not compatible with SAS-only backplanes.
- Can be used in workstations and desktop systems with PCIe-to-U.2 or M.2-to-U.2 adapters.
- May require manufacturer-specific drive trays or caddies.
OEM Part Numbers
- Western Digital: WUS4BB038D7P3E3
- Dell EMC OEM Equivalents: 0TS1929, 0TS2348, 0TS2088
- Supermicro Equivalent: HDS-WUV1-0TS1929
Ideal Applications
- Cloud Computing Platforms
- Virtualized Infrastructure
- Enterprise Data Centers
- Software Defined Storage
- Content Delivery Networks (CDN)
- Read-Heavy Database Environments
- Server Boot Volumes
- Web Hosting Infrastructure
- Hyper-Converged Infrastructure (HCI)
- High-Density Storage Arrays
