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  1. #1
    Join Date
    Jul 2008
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    Ottawa, Canada
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    Urgent: Please advise - Raid configuration

    Hi,

    I just got a Proliant DL360 G6 and I'm configuring it.

    I'm not new to setting up the server but this is the first time I'm setting Raid 1+0 in bios. and I'm excited!

    Just to make sure I'm asking the procedure.

    I have 4 hard drives. and a P410i Raid controller that supports Raid0, 1+0, 5, 50. I want to install a Raid 1+0 that requires 4 HDs. and Centos as operating system to work for me as a webserver.

    Questions:

    How many logical drives I have to assign?
    How many parity groups I have to make?
    how much boot partition might be suitable? (4 or 8)

    Thanks for your help

  2. #2
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    Jul 2008
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    got an answer to one of them. no parity.
    Can you help me with other 2?

  3. #3
    Join Date
    Jul 2009
    Posts
    240
    depends on the OS but typically a 100MB /boot should be sufficient

    edit: I read your post wrong - disregard

  4. #4
    Join Date
    Jul 2008
    Location
    Ottawa, Canada
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    yes, that's true for centos.

    What about the logical drive selection? I see 4 drives here with an x to select them. when I press enter on anywhere(either on hard drives that I've selected or raid 1+0 selection) it will prompt me that I have setup A hard drive with size ###.## as logical hard drive (A hard drive = 1?)

    So I'm not quite sure what I'm doing here in this part.

  5. #5
    Join Date
    Jul 2009
    Posts
    240
    if you want to build a RAID 10 - first you'll need to build two RAID-0(stripe) logical drives, then combine those two into a RAID-1(mirror)

    some RAID controllers will make you do the opposite sequence - so try each way

  6. #6
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    Jul 2008
    Location
    Ottawa, Canada
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    So can I create 2 raid0 logical drives in bios and then continue making raid 1 in centos by software? is it efficient?

    what would you do?

  7. #7
    Join Date
    Jul 2009
    Posts
    240
    no you do it all in the controller

    you create two raid-0 arrays then combine those to a raid-1 array

  8. #8
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    Jul 2008
    Location
    Ottawa, Canada
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    it does not allow me to do that.
    In Raid Setup, I selected 4 hard drives as logical hard drives, which are each 146 GB, and then selected raid 1+0 and it gave me in result one drive which is 279GB usable.

    what do you think?

  9. #9
    Join Date
    Feb 2006
    Location
    San Francisco, California
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    469
    You will have two logical drives each composed of two physical drives. At that point you'll tell the raid card to create a mirrored array and choose those two logical drives as the devices. At that point I suppose you would have one logical drive, at least according to the Operating System.

    If your raid card supports raid 1+0, don't do anything with raid in the OS or you won't be using the full potential.
    Larry Bly
    Sandbox IT Solutions, LLC.
    www.SandboxITSolutions.com
    Dedicated Servers - Web Hosting - Consulting Services

  10. #10
    Join Date
    Jul 2009
    Posts
    240
    Quote Originally Posted by jarchee View Post
    it does not allow me to do that.
    In Raid Setup, I selected 4 hard drives as logical hard drives, which are each 146 GB, and then selected raid 1+0 and it gave me in result one drive which is 279GB usable.

    what do you think?
    you're RAID controller is smart enough to do the two step process - so yes in a RAID-10 you will end up with one logical drive with 279GB

  11. #11
    Join Date
    Jul 2008
    Location
    Ottawa, Canada
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    Ok now I'm confused.

    is this what I should do?
    at first I select 2 hard drives and set them as logical drives with raid 0.
    again I do this to other remained physical drives and set them as logical with raid 0.

    but now in the main menu I dont see any setting that refers to making a raid 1 out of these two.

    There are:
    Create logical drive (when I click at this point it says no physical drive found)
    View logical drive (which just views them)
    delete logical drive
    select as boot controller
    manage license keys
    cache settings

    how should I make the raid 1 at this point?

    Is this procedure right or wrong? please advise.

  12. #12
    Join Date
    Jul 2008
    Location
    Ottawa, Canada
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    175

    Urgent: Please advise - Raid configuration

    Quote Originally Posted by DJMizt73 View Post
    you're RAID controller is smart enough to do the two step process - so yes in a RAID-10 you will end up with one logical drive with 279GB
    So I just select those 4 hard drives as logical with raid 1+0 and then continue installing Centos.

    Right?

  13. #13
    Join Date
    Jul 2009
    Posts
    240
    yes - it seems like thats the procedure for your particular RAID controller ..after its done creating, you can always check the arrays to make sure it created the proper RAID level

    then proceed on installing FreeBSD ...erm centos

  14. #14
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    Jul 2008
    Location
    Ottawa, Canada
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    Thanks, I think this P410i is really something!!

    Thanks for your advise. I'll try and let you know.

  15. #15
    Join Date
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    Use the smart install that came with the server... it will do all of this.. and install centos/rhel for you.
    Remote Hands and Your Local Tech for the Los Angeles area.

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