Raid re-config

1. offizieller Beitrag

    Righto.


    Currently I have the following setup using 4 x 3TB drives.



    I would like to change it to a Raid 5 config, using the 4 drives available and a 2TB drive in my pc.


    My plan,
    Back up what I can from M1 to separate 2TB drive.
    Break down M1 (drive 1 & drive 2)
    Pull a single drive from M2 (drive 3) - will the data still be safe and accessible?
    Create a Raid5 using the 2 drives from M1 and the single drive from M2 (drive 1, 2 and 3)
    Copy data from the other M2 drive (drive 4) over to Raid5
    Grow Raid5 to incorporate drive 4.


    Would that work?
    Is it likely to to rip a hole in time and space?
    Am I being an idiot by not understanding how things work?


    Cheers.

    If you could just go ahead and make a plugin for it, that'd be great.
    N54L/4GB/12TB

    • Offizieller Beitrag

    Your plan should work. It won't be fast and you risk loosing a lot of data if drive 4 or the separate 2 tb drive fails. You won't be able to build the degraded raid 5 array with the web interface though. Personally, I would do all of it from the command line.

    omv 7.0.5-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.13 | compose 7.1.4 | k8s 7.1.0-3 | cputemp 7.0.1 | mergerfs 7.0.4


    omv-extras.org plugins source code and issue tracker - github - changelogs


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    Drive 4 should be fine... I hope.


    I've not built a Raid array from command line before, how difficult is the process?


    How reliable is a Raid5 array in OMV ?

    If you could just go ahead and make a plugin for it, that'd be great.
    N54L/4GB/12TB

    • Offizieller Beitrag

    Command line is not bad. Just time consuming but it is slow from web interface too.


    My raid 5 array at home has been in place for 4+ years. If the server runs 24/7 with battery backup on the system, I would say they are great. If you turn it off all the time and/or no battery backup, people seem to have a few more problems. Just remember that raid is not a backup. Do you need redundancy or pooling or both?

    omv 7.0.5-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.13 | compose 7.1.4 | k8s 7.1.0-3 | cputemp 7.0.1 | mergerfs 7.0.4


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

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    • Offizieller Beitrag

    Is it on 24/7 and have battery backup?

    omv 7.0.5-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.13 | compose 7.1.4 | k8s 7.1.0-3 | cputemp 7.0.1 | mergerfs 7.0.4


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

    • Offizieller Beitrag

    I wouldn't run an array without battery backup (personal opinion).


    I would use the unionfilesystem plugin to pool the drives (mergerfs) and use snapraid for redundancy. If your data doesn't change much, you could probably run snapraid sync once a day for your redundancy.

    omv 7.0.5-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.13 | compose 7.1.4 | k8s 7.1.0-3 | cputemp 7.0.1 | mergerfs 7.0.4


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

    The last time I had a power outage was bout 15yrs ago,
    I'm more concerned with drive failure, hence the use of a Raid.


    I've tested the process of awesomeness in a VM and it all seems to work fine.


    Just got to move data about now.

    If you could just go ahead and make a plugin for it, that'd be great.
    N54L/4GB/12TB

    • Offizieller Beitrag

    Even an outage of just a few seconds that causes a reboot?

    omv 7.0.5-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.13 | compose 7.1.4 | k8s 7.1.0-3 | cputemp 7.0.1 | mergerfs 7.0.4


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

    Not had a power outage, even for a second, in over 15yrs.
    I live in a major city in the UK, our grid is pretty damn good.

    If you could just go ahead and make a plugin for it, that'd be great.
    N54L/4GB/12TB

    • Offizieller Beitrag

    That is impressive. I have good power too but not quite that good :)

    omv 7.0.5-1 sandworm | 64 bit | 6.8 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.13 | compose 7.1.4 | k8s 7.1.0-3 | cputemp 7.0.1 | mergerfs 7.0.4


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

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