vSphere lets you virtualize disk volumes and file systems so that you can manage and configure storage without having to consider where the data is physically stored.

Fibre Channel SAN arrays, iSCSI SAN arrays, and NAS arrays are widely used storage technologies supported by vSphere to meet different datacenter storage needs. The storage arrays are connected to and shared between groups of servers through storage area networks. This arrangement allows aggregation of the storage resources and provides more flexibility in provisioning them to virtual machines.

With VMware View 4.5 and later and vSphere 4.1 and later, you can now also use the following features:

vStorage thin provisioning, which lets you start out with as little disk space as necessary and grow the disk to add space later

Tiered storage, which allows you to distribute virtual disks in the Horizon View environment across high-performance storage and lower-cost storage tiers, to maximize performance and cost savings

Local storage on the ESX/ESXi host for the virtual machine swap files in the guest operating system

With Horizon View 5.1 and later and vSphere 5.0 and later, you can now also use the following features:

With the View storage accelerator feature, you can configure ESXi hosts to cache virtual machine disk data.

Using this content-based read cache (CBRC) can reduce IOPS and improve performance during boot storms, when many desktops start up and run anti-virus scans at the same time. Instead of reading the entire OS from the storage system over and over, a host can read common data blocks from cache.

With Horizon View 5.2 and later, if View desktops use the space-efficient disk format available with vSphere 5.1 and later, stale or deleted data within a guest operating system is automatically reclaimed with a wipe and shrink process.

You can deploy a desktop pool on a cluster that contains up to 32 ESXi hosts, with certain restrictions.

Replica disks must be stored on VMFS5 or later datastores or NFS datastores. If you store replicas on a VMFS version earlier than VMFS5, a cluster can have at most eight hosts. OS disks and persistent disks can be stored on NFS or VMFS datastores.