You can have two or three ESXi hosts in a VSA cluster. Each host must meet the hardware configuration requirements to join a VSA cluster.

VSA Cluster Requirements for ESXi Hosts

Hardware

VSA Cluster Requirements

Configuration

All ESXi hosts must have the same hardware configuration.

CPU

64-bit x86 CPUs

2GHz or higher per core

Memory

6GB, minimum

24GB, recommended

72GB, maximum supported and tested with vSphere Storage Appliance 1.0

1TB, maximum supported by ESXi 5.0

NIC

4 NIC ports must be available on each ESXi host. You can meet this requirements with one, two, three, or four Gigabit Ethernet NICs per ESXi host. To achieve NIC redundancy, you should have at least two Gigabit Ethernet adapters on an ESXi host. Installing more than two NICs depends on the availability of embedded NICs and additional PCI Express slots on the motherboard. The following NIC combinations are supported:

4 single-port NICs

2 dual-port NICs

2 single-port NICs and 1 dual-port NIC

1 quad-port NIC (does not provide NIC redundancy)

You can have more than 4 NIC ports per ESXi host but not less than 4.

Hard disks

Supported configurations

hard disks of the same model and with the same capacity. The number of disks depends on the RAID configuration you use.

2TB maximum capacity per hard disk, supported

180GB minimum total hard disk space per ESXi host, required

All SATA disks or all SAS disks

Non-supported configurations

A combination of SATA and SAS disks is not supported

JBOD is not supported

RAID controller

A RAID controller

Note

VMware recommends that you use RAID5, RAID6, or RAID10 configuration on the RAID controller of each ESXi host in the VSA cluster.