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Adding another drive for a RAID 1 config

Posted on 2016-10-17
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Last Modified: 2016-12-08
Hi, currently, we have a PC with one HD running Win7 home. I would like to add a RAID controller card and another HD to have a RAID 1 config.  Can I just add another HD to have RAID 1 config without erasing the data from the original HD?  (PLs note I prefer to have a hardware RAID, not the built-in Win7 software RAID).  Thanks.
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Question by:Soho_Dan
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David earned 1000 total points (awarded by participants)
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The answer is a function of the specific controller.  If you get a decent one, then you CAN do this hot.  (Note, if your RAID controller can't do online migration, then chances are it is total crap and might not even support load balancing)
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by:Soho_Dan
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Hi LVL 46, when you said decent one, which controller were you referring to?  Pls bear in mind, this is only a PC and we are not interested in load balancing or other RAID options. Thanks.
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by:rindi
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With Windows 7 home doesn't support OS Software RAID anyway, you need at least Windows 7 Pro for that.

For Windows 7 home my opinion is that RAID isn't worth the extra cost, as you'd need a real hardware RAID controller. Those fake-RAID controllers most mainboards come with are useless, and OS built-in RAID is the much better option. Getting a real hardware RAID controller is expensive, and you'd also need expensive enterprise class disks to match the controller.

With home versions of Windows you are better off investing in backups and taking those very seriously.
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by:Gerald Connolly
Gerald Connolly earned 500 total points (awarded by participants)
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It's probably cheaper (and easier) to upgrade to Windows Pro ( approx USD100) which will give you Software RAID capability
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by:Soho_Dan
ID: 41848486
Thanks Gerald. Pls read my original post. Not interested in software RAID.
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by:Gerald Connolly
Gerald Connolly earned 500 total points (awarded by participants)
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For RAID-1 its better than all but the most expensive Hardware RAID controllers! (ie faster, more reliable) So just dont write it off, lots of recommendations on here from multiple experts to use software RAID-1

(NB beware fake-RAID controllers that come on most PC motherboards these days, in general they are very unreliable)
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by:Soho_Dan
ID: 41848598
Was thinking of a Promise RAID controler card. Have used them before and they seem reliable. My question is not really about what controller card to go with, but if I need to reinstall my OS if I were to add another drive for mirroring.
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by:Gerald Connolly
Gerald Connolly earned 500 total points (awarded by participants)
ID: 41848617
As ever when changing/upgrading/modify your storage, always have a an uptodate backup.

From what i remember you just need to convert both your current disk and the new disk to dynamic disks (NB there is no easy way to go back to basic disks easily.) Then right click on the volume that contains all your data, choose add mirror, select the new disk and it should set it all up and start synchronising!
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by:David
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