extend mirror from a not wiped HDD

  • There is really no way to create a RAID1 from an already used HDD to a wiped one?
    It really makes no sense to me, because raid 1 is simply a copy, so there should'nt be any problem to do that :/ For what I know even Windows can do that!

    Intel G4400 - Asrock H170M Pro4S - 8GB ram - Be Quiet Pure Power 11 400 CM - Nanoxia Deep Silence 4 - 6TB Seagate Ironwolf - RAIDZ1 3x10TB WD - OMV 5 - Proxmox Kernel

    • Offizieller Beitrag

    There is really no way to create a RAID1 from an already used HDD to a wiped one?


    What's issue here? you have HDD that you want to add to your current mirror and that HDD is already being used?


    Or you want a single drive, that's already formatted and mounted to convert it to RAID1?


    For what I know even Windows can do that!


    This is the linux village.

  • I believe that is related to this thread:


    Raid1 hardware or software?


    So my first guess would be:
    He is trying to run a raid1 on from the OS disk. That is not supported - end of story.


    The other thread is dealing with it.


    Once you have installed the OS on the USB/Flash drive, you should be able to wipe both HDDs.


    Find out the name of the disks (e.g. sda/sdb) and then overwrite the first two MB with DATA like:


    WARNING: ALL DATA ON BOTH DISKS ARE LOST FOREVER!


    dd if=/dev/zero of=/dev/sda size=2M
    dd if=/dev/zero of=/dev/sdb size=2M


    That actually removes all headers and partitions from the disks and you can then create a raid with OMV with both.

    Everything is possible, sometimes it requires Google to find out how.

    • Offizieller Beitrag

    There is really no way to create a RAID1 from an already used HDD to a wiped one?
    It really makes no sense to me, because raid 1 is simply a copy, so there should'nt be any problem to do that :/ For what I know even Windows can do that!


    I've never used it but look at raider.


    I can think of lots of things Linux can do that Windows can't...

    omv 7.0.4-2 sandworm | 64 bit | 6.5 proxmox kernel

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


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

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  • I've never used it but look at raider.


    I can think of lots of things Linux can do that Windows can't...


    I know, that's the reason why I thought that linux had a function like that :) i'll look for raider, but the last update is from 4 years ago, i'm not really sure about using it :/

    Intel G4400 - Asrock H170M Pro4S - 8GB ram - Be Quiet Pure Power 11 400 CM - Nanoxia Deep Silence 4 - 6TB Seagate Ironwolf - RAIDZ1 3x10TB WD - OMV 5 - Proxmox Kernel

    • Offizieller Beitrag

    It still works. Not many mdadm functions have changed.

    omv 7.0.4-2 sandworm | 64 bit | 6.5 proxmox kernel

    plugins :: omvextrasorg 7.0 | kvm 7.0.10 | compose 7.1.2 | k8s 7.0-6 | cputemp 7.0 | mergerfs 7.0.3


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


    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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