Virsto™ Software, an innovative provider of VM-centric storage hypervisor software, today reached a significant milestone in the company’s product roadmap and vision by extending support to VMware vSphere. With today’s beta release announcement of Virsto for VDI, vSphere Edition, Virsto becomes the industry’s first multi-hypervisor solution to address the storage challenges specific to virtualized environments. Just as the hypervisor did for servers, Virsto is delivering new levels of efficiency, affordability and agility for storage in virtualized environments. Traditionally, provisioning storage in virtualized environments required a choice between production-level performance and efficient storage capacity consumption. With its hypervisor-agnostic, software-based approach to storage virtualization, only Virsto combines performance and efficiency to fundamentally transform the economics of storage for virtual machines (VMs).

1. Storage for Virtualization and Cloud Mark Davis CEO, Founder August 2011 Virsto Confidential

2. VirstoSoftware VMware for Storage Vision VM-centric “Storage Hypervisor” software Technology No-compromise storage virtualization software for VMs: Efficient, Affordable, Agile Value Virstofor VSI, Virsto for VDI; Hyper-V & vSphere Support Solutions Five production releases since 2/2010 launch Product Dozens: Enterprise, Cloud, VDI; in production Vitals Founded 2007 Silicon Valley 38 employees Customers Over $20M from top tier venture capitalists Funding August 2011 © Virsto, confidential 2

3. Major datacenter initiatives driving needs Virtualization Cloud, Dynamic Infrastructure Server, Desktop Consolidation Virtualization is essential for Consolidation and Cloud August 2011 © Virsto, confidential 3

4. Where virtual computing is headed CLOUD SCALE VIRTUAL STORAGE ARCHITECTURE Beyondthestorage array Abstract VM storagefrom hardware VASTLY HIGHER UTILIZATION RADICALLY NEW ECONOMICS Always thinly provisioned,no VM duplication Distributed, commodity,hardware independent Virsto already delivering on these value propositions August 2011 © Virsto, confidential 4

5. The importance of multi hypervisor Uniformly powerful storage capabilities Migrate quickly between hypervisors Avoid hypervisor lock-in August 2011 © Virsto, confidential 5

6. Virsto for VDI, vSphere Edition Product Introduction

7. Virsto momentum Virsto for virtual servers Hyper-V Virsto for VDI Hyper-V Virsto for VDI vSphere Virtual Servers& Desktops VMware & Xen Q210 Q211 2H11 2012 Enter virtual server market Enter VDI market 40 customers Houghton Mifflin Flextronics, etc. Enter VMwaremarket Multi hypervisor More VMwaresolutions Enter Xen market August 2011 © Virsto, confidential 7

8. Enhancing VMware vSphere Industry’s most scalable, high performanceVMDK snapshot/clones Highest performance thin provisioning Storage tiering without hardware dependencies Block storage performance with NAS ease of use Optimized VDI with 50+% lower storage cost/desktop vSphere + Virsto = Higher Customer Value August 2011 © Virsto, confidential 8

9. Virsto business implications for vSphere Lower VDIstorage costs30-50% Restart stalledor derailedVDI projects Avoidvendorlock-in August 2011 © Virsto, confidential 9

10. Virsto technical implications for vSphere Instant provisioning Zero space consumption vSphere integration Thin provisioned Increased IOPS/spindle Boot, logon storms Across vMotions Scalable VM clones,no performance loss Greater virtualdesktop density Consistent high performance August 2011 © Virsto, confidential 10

11. VDI complicates the storage problem VDI workloads even more random, write intensive Much wider variability between peak and average IOPS Scale: provisioning/managing thousands of VM images VDI storage costs even higher August 2011 © Virsto, confidential 11

12. Virsto for VDI, vSphere Edition August 2011 © Virsto, confidential 12

14. 100% software

15. High performance, scalable snapshots/clones

16. Instant thin provisioning without performance loss

17. Predictable performance

18. Hardware independent storage tieringAugust 2011 © Virsto, confidential 13

19. Familiar vCenter management Standard vSphere console Optimized workflows where vDisks are involved Simple storage tiering, cloning, space savings Compatible with key VMware tools August 2011 © Virsto, confidential 14

20. Briefing summary Evolution of virtual computing requires a storage hypervisor Virsto is the first and only multi platform solution Shipping on Hyper-V since 2010 Announcing beta program Aug 30 for vSphere VDI Starts at $2,800 per host August 2011 © Virsto, confidential 15