Microsoft has updated the Mailbox Server Role Requirements Calculator for Exchange 2010 and 2007 once more…. !

Calculator for Exchange 2007 -

Version: 17.5
File Size: 224.1kB
Bug Fixes & Enhancements:

• Fixed the IOPS calculation formula to take into account the scenario where both the IOPS Multiplication Factor is set to a value above 1 and the Outlook client type is Online Mode.
• The calculator now correctly evaluates the formatted disk capacity of disks, as opposed to estimating it.

Download here http://msexchangeteam.com/files/12/attachments/entry438481.aspx

Calculator for Exchange 2010 -

Version: 7.7
File Size: 347.9kB
Bug Fixes:

• Fixed an issue in site resilient designs where the number of HA copies between datacenters was asymmetrical that resulted in a condition where the number of activated copies after a server failure was less than the number of copies during normal runtime.
• Fixed log and restore LUN disk formatted capacity calculation formulas to accurately calculate formatted capacity as opposed to estimating it.
• Fixed an issue to prevent a situation where the number of activated database copies per server in the primary datacenter was greater than the total number of copies per server.
• Improved the calculations for the number of required servers in the secondary datacenter, as well as, the number of lagged copy servers by rounding up, as opposed to simply rounding.
• Improved the number of active database calculations for 2-member DAGs deployed in a site resilient configuration.
• Improved the cross-site database failover calculations during double server failure events in the primary datacenter (where a portion of the databases are activated in the secondary datacenter).
• Fixed the Number of Required Mailbox Processor Cores (Secondary Datacenter) calculation to only consider solutions that have HA copies in the secondary Datacenter.
• Fixed and improved various comments throughout the calculator.

Enhancements :

• Added two new columns to the primary datacenter “Active Database Configuration / DAG” table.  These columns now expose the total number of databases activated in each site after server failure events.  This change was added to expose cross-site database failover events.
• The calculator now includes an option to activation block secondary datacenter mailbox servers that host HA database copies.  This allows you to design a solution where you can activate the secondary datacenter in the event of a primary datacenter failure mode, or choose to activate a copy in the secondary datacenter manually, but prohibits Active Manager from automatically activating a copy in the secondary datacenter.  This may be useful in certain environments where WAN costs are high, or utilization of the WAN is high, and thus you want to control when users access data from the secondary datacenter.  From a server planning perspective, enabling cross-site database failover has the potential to impact the primary datacenter server design (e.g., can increase the design to support double server failure events, which can impact memory and CPU sizing), while disabling cross-site database failover, can potentially increase your outage scenarios, but allows you to control the situation better.
• Over the years, many requests have come in asking to increase the number of mailbox tiers in the calculator. Well finally we did something about it. In this version, we’ve added a fourth mailbox tier.
• Added support for 32-cores.
• Originally, the IOPS Multiplication Factor calculations worked as follows:
  Base IOPS + (Base IOPS * IOPS Multiplication Factor) = New IOPS Profile
  This was often times confusing, especially with regards to third-party applications that had multiplication factors, so we’ve simplified the formula as follows:(Base IOPS * IOPS Multiplication Factor) = New IOPS Profile
  which means that if previously you entered in a value of say .5 as the multiplication factor, you now need to enter into the calculator a value of 1.5.

Download here http://msexchangeteam.com/files/12/attachments/entry453145.aspx

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