Best disk configuration for Exchange 2007

Hello,

I have a client with a new Dell PowerEdge 2950.  The sever has 2 x 73GB drive and 4 x 300Gb drives.  I have read all the post and articles, but am still struggling with the best drive/partition setup.  The server will host about 150 users, once we import all the mail we figure to be using about 70GB.  I don't think doing 3 mirrored sets will work, because we lose to much disk space.

ewaggonerAsked:
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kieran_bCommented:
2 x 73 - RAID1, OS + Transaction logs
4 x 300 - RAID5+, Databases

If you can slip another 1 or 2 disks in there, I would be putting the transaction logs on them.
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Mal OsborneAlpha GeekCommented:
I agreee.  150 users is not a lot, that config should work just fine.
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ewaggonerAuthor Commented:
Thank you both, that's the direction I was heading.  One more thing, we are going to use multiple storage groups and databases so we will have more log files, but I assume the space taken by the log files isn't much more?  What is a rule of thumb for how much space the log files will use?
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ewaggonerAuthor Commented:
Just thought of one more thing, the Exchange install files (program files) should be on C: as well, correct?
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Mal OsborneAlpha GeekCommented:
Assuming you are running regular, Exchange aware backups, and have circular logging disabled, log space on drive C: should not be an issue.  Exchange accumulates logs, & deletes them when a backup is run, therefore if backups fail for weeks on end it can be a problem.  I doubt that in your setup log files will ever exceed a few Gig.

I would install Exchange program files & leave the mailroot folders on C:
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ewaggonerAuthor Commented:
Experts, thank you very much for you quick response and excellent answers.  
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kieran_bCommented:
Log files are wholey determined by how much mail traffic you have between backups - if you receive/send 5GB of mail a day, but only do a full backup once a week, your logs will require more than 25GB of space.
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