Re: Convert RAID1 to RAID5
- From: aus <aus@xxxxxxx>
- Date: Thu, 07 Dec 2006 13:40:29 +0000
Leythos wrote:
In article <uqg$pfMGHHA.3268@xxxxxxxxxxxxxxxxxxxx>, aus@xxxxxxx says...I would advise against using the existing disks with new ones to make a new RAID 5 set. I advocate RAID 1 for everything - ine for OS one for data; you wont see any real word difference between mirroring and RAID 5 and there is just so much less to go wrong - a few years of seeing the two options work and fail in many incarnations has convinced me!
In a typical R5 array that is installed/setup by small shops, where they have 3xDisk for R5, you are right, but, in a proper setup where you have 5xDisks or more, then you will see a LOT of read performance that you don't get out of a Mirror - this is very much the case when you have LOTS of users accessing the server or have a SQL database that users are hitting.
Wait till you get into more users, on a properly setup server, you'll notice the difference in a heartbeat.
With SBS you have a 75 user limit and even with multiple disks you wont see any real difference compared to properly set up mirrors - even with SQL. If you setup a mirrored server with dedicated page file disks (unmirrored) it will match a RAID-5 array for most all applications I have seen (I'm sure there may be exceptions). The difference is using multiple mirrors - not one (and on separate channels) - together with separate page disks. I'm guessing you have never tested this configuration - most don't.
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- References:
- Convert RAID1 to RAID5
- From: Curtis
- Re: Convert RAID1 to RAID5
- From: aus
- Convert RAID1 to RAID5
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