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Thread: how to change ovh server raid to 0

  1. #11
    Expeto's Avatar current user title
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    Quote Originally Posted by slacker View Post
    Code:
    mdadm --create /dev/md2 --level=0 --raid-devices=2 /dev/sda2 /dev/sdb2
    Slackers, they surely know their way with cli

    @mike160

    My advice will be clean install. You already tried few random advices and failed, its possible that you have already broken something, which might lead to future problems.
    At least check `cat /proc/mdstat` to see the current md state of your server before using mdadm.
    Last edited by Expeto; 11-09-2010 at 09:05 PM.
    ...

  2. BitTorrent   -   #12
    mike160's Avatar Old School
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    thanks all everthing is working now

  3. BitTorrent   -   #13
    I'm in the verge of doing the same as mike did, but i would like to ask a few things if i may.
    Since we are talking about softraid are there any downsides to having a soft one instead of a hardware raid?
    Apart from having 2 separate disks show as one, do you also get a better speed and better allocation and hashing on torrents when you have a softraid?
    And am i right to assume that since it's a software thing, then its performance would greatly depend on the specs of the system (cpu,ram etc etc)?

    Right now i can see on my ovh server both my disks (1.5tb each) seperately of course (i can download on both if i want) and i'm trying to figure out if it's worth wiping everything and setting up from the start in order to have a soft raid. would i see any difference in rt/rut?

    Thank you all
    Last edited by The_Wire; 11-10-2010 at 09:52 AM.

  4. BitTorrent   -   #14
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    softraid is faster in some cases, slower in others. for a seedbox you won't notice.

    if you have a gbit server you will definitely notice a faster speed, and 100mbit will be slightly faster.

  5. BitTorrent   -   #15
    Cabalo's Avatar FileSharingTalker BT Rep: +24BT Rep +24BT Rep +24BT Rep +24BT Rep +24
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    Quote Originally Posted by The_Wire View Post
    I'm in the verge of doing the same as mike did, but i would like to ask a few things if i may.
    Since we are talking about softraid are there any downsides to having a soft one instead of a hardware raid?
    Apart from having 2 separate disks show as one, do you also get a better speed and better allocation and hashing on torrents when you have a softraid?
    And am i right to assume that since it's a software thing, then its performance would greatly depend on the specs of the system (cpu,ram etc etc)?

    Right now i can see on my ovh server both my disks (1.5tb each) seperately of course (i can download on both if i want) and i'm trying to figure out if it's worth wiping everything and setting up from the start in order to have a soft raid. would i see any difference in rt/rut?

    Thank you all
    You might want to format the disks as ext4 and tweak them, adding noatime and writeback flags to your mount options. I've noticed increases in hard disk performance to up to 30% on some cases, especially when the disk is nearly overloading.

  6. BitTorrent   -   #16
    Quote Originally Posted by Cabalo View Post
    You might want to format the disks as ext4 and tweak them, adding noatime and writeback flags to your mount options. I've noticed increases in hard disk performance to up to 30% on some cases, especially when the disk is nearly overloading.
    Thank you for this information Cabalo! it's a bit techical for me (that noatime writeback flags etc) but i will keep it in mind and search some more for it once i decide to wipe the system and re-setup it.

    also thank you Thelen for your input.

    The bottom line is that even with soft-raid i will see a difference and will help the hdd and overall performance. So it's worth the effort.

  7. BitTorrent   -   #17
    Cabalo's Avatar FileSharingTalker BT Rep: +24BT Rep +24BT Rep +24BT Rep +24BT Rep +24
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    You don't have to wipe your system to use those flags, even if you are on ext3.
    There's this tutorial: http://blog.smartlogicsolutions.com/...m-performance/

  8. BitTorrent   -   #18
    mike160's Avatar Old School
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    thanks cabalo

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