This is general purpose storage, designed to be used for most of your data. This includes operating systems, primary data storage (such as shared drives, documents, etc.) and provides a fantastic balance of cost and performance.
IO performance on Tier 2 storage is set at 200 IOPs per server. This is ample speed for the majority of business applications. Storage is delivered from RAID-DP or RAID-6 arrays, sometimes with SSD caching.
Backups are included as standard with this storage tier.
This storage can be divided up between your cloud servers as you see fit after the service has been provisioned. When ordering, you should order as much storage as you will require for your whole environment.