EDSFF E1 Form Factor

KIOXIA Corporation provides next-generation data center NVMe™ SSDs with its XD7P and XD8 Series, which are designed to the Open Compute Project (OCP) Datacenter NVMe™ SSD specification and available in E1.S form factors. There are a number of key reasons why these new EDSFF E1.S SSDs can enable a data center server architecture to adapt to changes, but the top five supported by KIOXIA include:

Higher Performance / Higher Power Budget vs. M.2 Devices: More than doubles the power budget versus M.2 devices, enabling E1.S SSDs to saturate PCIe^® Gen5 performance.

Standardized Thermal Solutions: Improves interoperability across vendors and platforms while providing the flexibility to select the right balance of cooling and storage density through different E1.S heatsink options.

Improved Physical Serviceability: Vastly improves serviceability with hot plug support that no longer requires an entire server to be taken down in order to replace a single SSD.

Designed to Better Accommodate NAND Flash Memory Packages: Wider PCB design enables optimized orientation of the NAND flash memory packages, providing headroom for higher capacity drives.

Supported by Leading Hyperscalers: Meta™ and Microsoft^®, leading authors of the OCP Datacenter NVMe™ SSD specification, are specifying E1.S designs on upcoming OCP platforms, promoting industry-wide adoption.

E1 - Hyperscale Servers and Storage

Type	Thickness (mm)	Width (mm)	Length (mm)	Max Power (W)
E1.S 5.9 mm	5.9	31.5	111.49	12
E1.S 8 mm with heat spreader	8.01	31.5	111.49	16
E1.S 9.5 mm with symmetric enclosure	9.5	33.75	118.75	20
E1.S 15 mm with asymmetric heatsink	15			25
E1.S 25 mm with asymmetric heatsink	25			25
E1.L 9.5 mm with symmetric enclosure	9.5	38.4	318.75	25
E1.L 18 mm with symmetric heatsink	18	38.4	318.75	40

EDSFF E1.S Use Cases

E1.S form factors are well-suited for these use cases:

E1.S (9.5 mm)

Target System	Small footprint systems
Examples	Blade servers; Edge compute and storage systems; Dense, scaled servers
Primary Need(s)	Performance; Excellent thermal capabilities
Use(s)	2.5-inch and M.2 replacement
Typical Configuration	6 to 12 E1.S SSDs

E1.S (15 mm)

Target System	1U/2U/4U and special-purpose systems
Examples	Compute blades and systems; Performance and capacity-optimized storage systems; Artificial Intelligence/Machine Learning (AI/ML) and High Performance Computing (HPC) systems; Edge systems
Primary Need(s)	Scalable performance and capacity; Optimized thermal performance
Use(s)	2.5-inch and M.2 replacement for boot and primary storage
Typical Configuration	2 to 32 E1.S SSDs

E1.S (25 mm)

Target System	2U and larger systems
Examples	Storage appliances; Input/Output (I/O) and storage-rich servers / databases; Performance-oriented storage systems
Primary Need(s)	Scalability of performance with capacity; Lower cost per performance
Use(s)	Mainstream 2.5-inch replacement
Typical Configuration	36 to 64 E1.S SSDs

KIOXIA EDSFF E1 Offerings

KIOXIA XD7P Series

KIOXIA XD7P E1.S 9.5mm, 15mm, and 25mm product image

KIOXIA XD8 Series

KIOXIA XD8 E1.S 9.5mm, 15mm, and 25mm product image

KIOXIA SSD Series	Form Factor	Endurance	Interface	Storage Capacity (GB)	Sequential Read/Write (MB/s)	Random Read/Write (IOPS)
XD8	EDSFF E1.S	Read Intensive (1 DWPD for 5 years)	PCIe^® Gen5 x4, NVMe™ 2.0	1,920 3,840 7,680	Up to 12,500 / 5,800	Up to 2,300K / 250K
XD7P	EDSFF E1.S	Read Intensive (1 DWPD for 5 years)	PCIe^® Gen4 x4, NVMe™ 2.0	1,920 3,840 7,680	Up to 7,200 / 4,800	Up to 1,650K / 200K

Companies Offering EDSFF E1.S-enabled Platforms

EDSFF E1.S server and storage platforms are becoming available in the market. Here are some E1.S enabled products that are announced or currently available, as of September 2023.

Supermicro^® Servers

Learn and Evaluate

Enterprise and Datacenter Standard Form Factor (EDSFF) | Infographic (PDF : 426KB)

UPDATED

Overview of EDSFF E1.S Form Factors | White Paper (PDF : 1.4MB)

Check the above white paper for E1 enclosures and other resources.

KIOXIA XD8 Series E1.S Data Center NVMe™ SSD | Product Overview (PDF : 546KB)

KIOXIA XD8 E1.S Series | Product Brief (PDF : 206KB)

KIOXIA XD7P E1.S Series | Product Brief (PDF : 151KB)

KIOXIA XD7P Series PCIe^® 4.0 EDSFF E1.S SSDs Accelerate Database Storage Performance and Improve Data Center Density Challenges | Application Brief (PDF : 392KB)

5 Tips for Improving Data-Center Flash Storage with EDSFF E1.S SSDs | Electronic Design

High-Density E1.S Server/Storage Solution: Supermicro^® All Flash Petascale Server with KIOXIA XD6 Series SSDs | Solution Brief (PDF : 592KB)

Press Releases

KIOXIA Announces Next-Generation EDSFF E1.S SSDs for Hyperscale Data Centers

KIOXIA EDSFF E1.S SSDs Now Available for Hyperscale Data Centers

KIOXIA Introduces Industry’s First PCIe 4.0 OCP NVMe Cloud Specification-Enabled SSD

Product image may represent a design model.
PCIe is a registered trademark of PCI-SIG.
NVMe is a registered or unregistered mark of NVM Express, Inc. in the United States and other countries.
The Open Compute Project and OCP marks are owned by and used with the permission of the Open Compute Project Foundation.
Other company names, product names, and service names may be trademarks of third-party companies.
All rights reserved. Information, including product specifications, content of services, and contact information is believed to be accurate as of January, 2025, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable KIOXIA product specifications.