EDIT: This post has been updated on 12/2/2008 to match the newest version of Exchange Server 2007 Mailbox Server Storage Cost Calculator.
Overview
Earlier versions of Exchange did not scale wel...
Updated Jul 01, 2019
Version 2.0
Blog Post
I see two immediate problems with this tool:
1. It assumes clones. Not all snapshots (example: MS Software VSS Provider based snapshots) are clones.
2. It does not account for backups of the CCR active or passive nodes. Running CCR in a backupless environment is not supported by MS for Exchange 2007.
In this case you are inflating the size of SCC on SAN by 300% based on faulty assumptions, and undersizing CCR on DAS by a similar factor in that you neglect to include backups (which you must have to be supported).
1. It assumes clones. Not all snapshots (example: MS Software VSS Provider based snapshots) are clones.
2. It does not account for backups of the CCR active or passive nodes. Running CCR in a backupless environment is not supported by MS for Exchange 2007.
In this case you are inflating the size of SCC on SAN by 300% based on faulty assumptions, and undersizing CCR on DAS by a similar factor in that you neglect to include backups (which you must have to be supported).