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Date:      Wed, 17 Jan 2001 19:40:03 -0500
From:      Mike Tancsa <mike@sentex.net>
To:        Sys Admin <admin@cb21.co.jp>, freebsd-stable@freebsd.org
Subject:   Re: RAID configuration for a mail server (1 or 5)
Message-ID:  <4.2.2.20010117193231.03731950@marble.sentex.net>
In-Reply-To: <Pine.BSF.4.21.0101180306090.2135-100000@ns1.cb21.co.jp>

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At 03:12 AM 1/18/2001 +0900, Sys Admin wrote:

>** I sent this same mail to isp list. But I am yet to get a
>response. Hoping that I will have some luck here.  If this is not the
>right list to ask, please redirect **

Questions is more appropriate. Also, you may want to scan through the 
archives, as questions like this have been asked and answered 
before.  www.dejanews.com is your friend and Oracle!

  We have a mail server that supports few hundred domains supporting few
>thousand pop accounts. What kind of RAID configuration suits a fairly
>busy mail server ?


For speed, reliability and cost, have a look at the 4port 3ware card 
(www.3ware.com) in RAID 10 config.  Two RAID0 sets mirrored together. Get 
yourself some inexpensive drawers ( eg 
http://www.startech.com/ststore/ItemDetail.cfm?Product_ID=IDE66BASIC) and 
you have a fairly fast, reliable and cost effective setup. Hot swapable 
SCSI RAID is also nice, something like the AMIMegaRAID, or the supported 
Adapec will do as well.  Decide what fits your budget.  The final price 
does not necessarily linearly scale with the protection/benefits level for 
your situation.
Also, lots of RAM so that mailboxes can be cached as they are being read 
helps a lot.  With the price of RAM these days, 512MB will make any server 
happy.

         ---Mike
--------------------------------------------------------------------
Mike Tancsa,                          	          tel +1 519 651 3400
Network Administration,     			  mike@sentex.net
Sentex Communications                 		  www.sentex.net
Cambridge, Ontario Canada			  www.sentex.net/mike



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