Minimum hardware for private cloud

I am in a  colo in houston.  I want to offer private cloud to peeps.  I'm thinking that starting off with two ESXi hosts, one SAN and tape BU will be a good start.  So, I know that a lot of this is opinion, but give me some thoughts on your idea of minimum hardware for private cloud offerings for say a couple of mail servers for small offices (<20 users) and maybe a file server or two.



PS:  Let's assume my power, redundant internet pipes and etc is all good, because it is.
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Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
That looks like a good start, but you may want to re-consider Tape Backup, because ESXi does not support the connecting of a tape drive to the servers.

Most VMware Admins now use storage or disk backup.

other Backup Products to consider also

AppAssure - Number 1 Backup and VMs and Cloud

Unitrends - a good vRecovery Backup Appliance.

Symantec Backup Exec V-Ray Edition - Unmatched backup and recovery designed for virtual and physical environments

VM Explorer - Simply, cost effective and it works.

Acronis Backup & Recovery® 11 Virtual Edition - simple but effective

StorageCraft ShadowProtect Server  - amazing but can be expensive

NAKIVO Backup & Replication for VMware - current testing proves very postiive

vBackup - in Beta
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