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Exchange 2007 Storage Groups on same or different LUN (volume)?

Posted on 2008-01-31
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I am configuring an Exchange 2007 server for 300 users with mailbox quotas ranging from 500M to 2GB.The OS and transaction logs are aleady on dedicated RA!D10 volumes. I have a dedicated data rack for the Exchange databases with 8-300GB drives configured as RAID10 for 1.2 TB total DB storage. I may use Standard or Enterprise (not sure yet) with a minimum of 5 storage groups and 1 DB per storage group.  My question is whether for this RAID 10 1.2TB data store area it would make any logical sense to subdivide it into multiple LUNS (volumes) and put each storage group in a separate volume, or whether not to just put all the storage groups (each with one databases) in one large 1.2TB volume. The advantage of dumping them together would be the ability for the DBs to dynamically grow without regard to worrying about each volume size boundaries. Having separate volumes adds to complexity but would it buy me anything performance wise or any other aspects?
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Question by:jmarkanich
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e_vanheel earned 1000 total points
ID: 20788618
The reality is that with Exchange 2007 and Outlook in Cached Mode, it is very difficult for users to notice any performance issues.  RAID 10 will provide incredible performance, so I would stick with the KISS principle and go with large LUNs.  The added comlexity doesn't really provide you any real benefit and you will waste more disks by carving up more LUNs.
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by:jmarkanich
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Great answer. Sounds very logical and was actually the answer I was looking for to acheive simplicity. Thanks!
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