FS and RAID pair

  • Hello,

    I have some interrogation with File System and Raid. I see that have many forum thread/ blog post / ... on RAID or on FileSystem but I don’t see a discution on RAID and File system (and they are old, + or - 4 years).

    So, I am little confuse with that.


    XFS, BTRFS or ZFS, have a data duplication mechanism, right ?

    So do we really need to configure RAID 1,5,6, JOB ...?

    If a hard drive is ko, can this file systems rebuild a new hard drive?

    I answer "no, they can't" and "it's necessary use RAID" but it's for verify.


    I want to use RAID in addition to the above mentioned file systems for more and more security. OK, but wich FS with wich RAID ?

    For exemple I saw BTRFS and RAID 5 it's no recomended. Because when replace a HDD the other disks are very much in demand. so there is a chance (a bad chance) that another will be KO'd before the new one is ready. So with BTRFS is RAID6 is recomended .... (or not https://btrfs.wiki.kernel.org/index.php/RAID56 ? it's always like that ?)

    What about other FS?


    More generally which FS and RAID pair is recommended?

    Thank you for your help.

  • Maybe you want to try to include the authors of the initial threads in this

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  • Same question on my side, is there any recommended FS and RAID combination? Inside the docs I couldn't find a recommendation: https://openmediavault.readthe…torage/raid.html#overview

    I have set up my OMV-NAS with RAID6 and btrfs but when I browse through this: https://github.com/openmediavault/openmediavault/issues/101

    without really understanding everything I would assume my choice was not the best?!?

    • Official Post

    is there any recommended FS and RAID combination?

    My recommendation would be to use the combination that *you* can recover from a failure. For most users, this means not using raid and a simple filesystem like EXT4.

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