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Exchange 2007 to 2016 Storage Sizing.

lamakama
lamakama asked
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Last Modified: 2018-04-25
Hello All,

I had a question that hopefully you can answer. We are migrating from Exchange 2007 to Exchange 2016 (with a 2013 hop) and we are trying to properly configure the sizing on the server.

These new server for exchange 2016 will be on a ESXi/SAN environment.

Our current setup is:

500MB~ Average mailbox size for 450 mailboxes
100~ messages send/receive on each mailbox
8 Databases totaling only 480GB about 60GB each
3 servers. 2 mailbox, 1 cas.

Future setup:

Same as above except we will have a DAG protecting 4 databases.


Our PS team came back with needing almost 15TB of storage per server, 2 new servers. This seems excessive and something we do not currently have available on our SAN.

If you need any info please ask. Thanks.
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Scott CSenior Engineer
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Hello,

Not exactly sure what the results are telling me here. The two tabs don't add up to each other and the OS volume isn't there.


Thanks

LK
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E ATech Lead
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Exchange 2016 requires essentially the same RAM/CPU/IOPs per mailbox as Exchange 2013 but requires just a little more compute requirements.

Exchange 2016 only has a single role (MBX role) so the Exchange 2013 guidance needs to be followed for multi role servers.

See here for more information on these changes: https://blogs.technet.microsoft.com/exchange/2015/10/15/ask-the-perf-guy-sizing-exchange-2016-deployments/

Also check this article: http://community.spiceworks.com/how_to/122658-step-by-step-guide-for-migrating-from-exchange-server-2007-to-exchange-server-2013

Hope this helps!
Scott CSenior Engineer
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Commented:
Sorry I didn't get back to you sooner on your results.  Yes, sometimes the numbers don't come out exact, but they do show that you don't need anywhere near 15 TB of storage.

Glad we could help.