FlashSoft® 4 software is integrated with VMware vSphere 6 through the VMware vSphere APIs for IO filtering (VAIO) framework to provide a caching data service that eliminates I/O blender effects and storage bottlenecks so users can better realize the full potential of VMware infrastructure. Integration through VAIO and VMware Storage Policy Based Management (SPBM) makes FlashSoft easy to install, configure and maintain, while VMware Ready certification gives confidence in software stability and interoperability with vSphere.

Deploying Server Flash for VMware allows you to:

  • Migrate tier-one applications to virtual servers with confidence.
  • Configure and administer caching for VMware vSphere cluster-wide.
  • Increase application performance and virtual machine (VM) density.
  • Deploy valuable flash resources efficiently for maximum benefit.
  • Enhance the value of existing storage investments with I/O offload.


FlashSoft software makes the best use of solid-state architecture to deliver unparalleled storage performance improvements. Rather than statically partitioning the cache per VM, FlashSoft dynamically allocates cache space among all accelerated VMs, eliminating the inefficiencies of idle SSD space, and the inconvenience of manually reallocating cache resources when migrating VMs.

FlashSoft 4 software works with any standard SSD attached via SATA, SAS, PCIe, or NVME and supports vSphere 6-compatible datastores including VMFS and NFS.


  • Supports all VMware features: HA, vMotion®, DRS, Storage vMotion, etc.
  • Works with any data storage infrastructure and requires no change to storage management, backup, or compliance polices.
  • Integrated with VMware vSphere APIs for IO Filtering (VAIO)
  • Supports any guest operating system in the VMs.
  • Easily administered through the VMware Storage Policy Based Management (SPBM) and vCenter web client.


Unlike flash deployed in storage, FlashSoft software delivers the benefits of flash performance directly to the servers and workloads that require acceleration, without requiring modifications to data storage systems. As more I/O operations run on the solid-state devices installed in servers, traffic on the storage infrastructure is significantly reduced, increasing the value and the useful lifetime of existing storage investments.

System Requirements

Operating System
VMware vSphere 6 Update 2 or later
64-bit x86 processor with 2 or more cores
Cache Size
Minimum Size: 16GB per host
Maximum Size: 16TB per host
Storage Supported
vSphere 6 compatible datastores including VMFS and NFS

Now Available in Bundles!

FlashSoft software is now available in bundles with SanDisk PCIe, SAS, and SATA.

Case Studies

SanDisk and eDiscovery

Speeding Up the Internet of Things: Crane Merchandising

Plaxo, a Comcast Silicon Valley Innovation Center

Cloud Plus, a Private Cloud Solutions Provider

Middle Tennessee ENT, a Medical Clinic

White Papers

Caching Software Performance Test: Microsoft SQL Server Acceleration with FlashSoft Software 3.8 for Windows Server

EMA Impact Brief: Enhanced FlashSoft Software & Bundles Increase Performance, Lower Storage Costs

Performance Test: FlashSoft® 3.7 for VMware vSphere® 5.5

Data Sheets

FlashSoft 4 for VMware vSphere 6

FlashSoft 3.8 for Windows Server & Windows Server Hyper-V

FlashSoft 3.8 for Linux

FlashSoft 3.7 for VMware vSphere 5.1 & 5.5

Analyst Reports

EMA Impact Brief: FlashSoft Software 4.0 Increases Performance, Lowers Storage Costs

VMware and SanDisk Boost Caching with vSphere VAIO API

A Technology Validation by Taneja Group

Total Economic Impact Study by Forrester

Jun 23, 2016 - Western Digital Introduces FlashSoft 4 Software for VMware vSphere 6 and New Flash Virtualization System for Non-Disruptive Acceleration of Virtual Environments

Aug 31, 2015 — SanDisk FlashSoft Integrates Data Service for VMware vSphere by Lyle Smith, StorageReview

Aug 31, 2015 — SanDisk Announces FlashSoft 4 Integrated In VMware vSphere by Paul, Alcorn, Tom's IT Pro

Aug 26, 2014 — VMworld 2014 - Storage News Part 1: vSphere APIs for I/O Filters, Storage & Virtualization blog by Cormac Hogan

Aug 26, 2014 — SanDisk VAIO Server-Side Caching on Tech Field Day Extra at VMworld 2014

Jan 30, 2014 — "SanDisk FlashSoft 3.1 vSphere: tests" by Luca Dell'Oca

May 27, 2014 — SanDisk FlashSoft Caching Software Review (Windows) by Brian Beeler, StorageReview

Apr 16, 2014 — Enterprise Storage To Drive SanDisk's First Quarter Performance — Forbes

Jan 27, 2014 — "A closer look at SanDisk FlashSoft 3.1 for vSphere" by Luca Dell'Oca

Five Tips on How to Be Smarter with Your Flash Investment

The Five Myths of Server-Side Caching - Separating Fact From Fiction


Whether you’re a Fortune 500 or five person startup, SanDisk has solutions that will help you get the most out of your infrastructure.


Go ahead, ask us some questions and we'll get back to you with answers.

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