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date: Wed, 23 Jan 2008 01:26:41 +0000 (UTC),    group: microsoft.public.exchange.design        back       


Re: Number of LUNs in 2007   
Hello Mark Arnold [MVP],

> On Tue, 22 Jan 2008 02:32:30 +0000 (UTC), MS Poster
>  wrote:
> 
>> Hello:
>> 
>> I am rolling out a small Exchange 2007 deployment: 120 users. Using
>> the E2k7_Storage_Calculator_ext_v13.0 indicates that I should have
>> three databases with 40 mailboxes each. Additionally, it recommends a
>> database and Tx log LUN for each of those databases plus a restore
>> LUN. I have read some of the pros and cons but would welcome some
>> suggestions.
>> 
>> This will run on a single server with small local drive and attached
>> to an iSCSI device for db and tx LUNs. This array is 7TB in RAID 50
>> and is used by several other servers for a variety of storage needs.
>> My plan was to use (what I am seeing is) a more traditional 2003
>> model of apps on the local drives and then two LUNs on the iSCSI
>> array (one for DB and one for TX logs). Does this seem appropriate
>> for the 2007 install I've described?  If the LUNs are all sitting on
>> the same array is there still an advantage to using one each for the
>> db and logs?
>> 
>> Many thanks.
>> 
> 7TB? How many disks? 14 or 28?
> Why RAID50 (I assume 5)?
> You need to tell us what the iSCSI SAN is that you're planning.

Thanks, Mark. It is an Equallogic PS300e. 14 x 500 SATA. It is indeed RAID 
50 as that is the minimum supported RAID level (can't do RAID 5, for example). 
 It works out to about 4.46TB usable space of which 1TB is free. We have 
five LUNs attached to three different machines. 

thanks.
date: Wed, 23 Jan 2008 01:26:41 +0000 (UTC)   author:   MS Poster

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