What is the Difference between Hyper-V 2.0 and Hyper-V 3.0

What is the Difference between Hyper-V 2.0 and Hyper-V 3.0
The maximum number of virtual machines per host that can be powered on at any given time

Hyper-V 2.0
384

Hyper-V 3.0
1024


Maximum number of virtual machines in a cluster

Hyper-V 2.0
1000

Hyper-V 3.0
4000

Maximum number of hosts per cluster

Hyper-V 2.0
16

Hyper-V 3.0
63

Maximum RAM per host server

Hyper-V 2.0
1 TB

Hyper-V 3.0

2 TB

RAID Levels Supported By Windows Server 2012

RAID 0 (Disk striping)

Two or more volumes, each on a separate drive, are configured as a striped set. Data is broken into blocks, called stripes, and then written sequentially to all drives in the striped set.

Advantages: Speed and performance.

 

RAID 1(Disk mirroring)

Two volumes on two drives are configured identically. Data is written to both drives. If one drive fails, no data loss occurs because the other drive contains the data. (This level doesn’t include disk striping.)

Advantages: Better write performance than disk striping with parity.

 

RAID 5(Disk striping with parity)

Uses three or more volumes, each on a separate drive, to create a striped set with parity error checking. In the case of failure, data can be recovered.

Advantages : Fault tolerance with less overhead than mirroring. Better read performance than disk mirroring.

How to Decide Which Windows Server 2012 Versions Best for You:

Microsoft offers the following four versions of Windows Server 2012:

Windows Server 2012 Datacenter Edition:

 Windows Server 2012 Datacenter was designed for organizations that are looking to migrate to a highly virtualized, private cloud environment. Windows Server 2012 Datacenter has full Windows Server functionality with unlimited virtual instances.

Windows Server 2012 Standard Edition: 

 Windows Server 2012 Standard was designed for organizations with physical or minimally virtualized environments. Windows Server 2012 Standard has full Windows Server functionality with two virtual instances.

Windows Server 2012 Essentials Edition:

 Windows Server 2012 Essentials is ideal for small businesses that have as many as 25 users and 50 devices. Windows Server 2012 Essentials has a simpler interface and preconfigured connectivity to cloud-based services but no virtualization rights.

Windows Server 2012 Foundation Edition:

Windows Server 2012 Foundation was designed for smaller companies that need a Windows Server experience for as few as 15 users. Windows Server 2012 Foundation is a general-purpose server with basic functionality but no virtualization rights