Need Help Fixing OS Raid 1

Hello,

The server OS RAID 1 is failed one disk.. now It has been replace new disk.
I need someone to rebuild the raid. via rescue mode

Comments

  • tetechtetech OG
    edited January 2023

    If you're not comfortable doing it, you should hire a tech.
    @skorupion was looking for work?

  • If I had time I would rebuild it for him. Just a little bit in my plate for now. @skorupion should be able to handle it. If he isn't able or something comes up feel free to PM and we will see if we can sort it

  • RadiRadi Hosting ProviderOG
    edited January 2023

    Steps to replace a broken disk in software RAID array.

    Mark the disk as failed:
    mdadm --manage /dev/md0 --fail /dev/sdb1

    Verify:
    cat /proc/mdstat

    Example output:
    Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
    md0 : active raid1 sda1[0] sdb1 [2] (F)
    976773168 blocks [2/1] [U_]

    md1 : active raid1 sda2[0] sdb2[1]
    976773168 blocks [2/2] [UU]

    Remove disk from array:
    mdadm --manage /dev/md0 --remove /dev/sdb1

    P.S. You need to do the step 2 for each array, respectively replacing the partitions.

    Replace disk on machine.

    Copy partition table from the healthy disk to the replaced one.
    sfdisk -d /dev/sda | sfdisk /dev/sdb

    Add the replaced disk back to the array:
    mdadm --manage /dev/md0 --add /dev/sdb1

    P.S. You need to do the step 5 for each array, respectively replacing the partitions.

    Verify with:
    /sbin/mdadm --detail /dev/md0
    or again:
    cat /proc/mdstat

    Thanked by (4)ariq01 ehab bdl Not_Oles

    Get some hosting at https://drserver.net .

  • First step should be taking a full backup of all data while it's still accessible. If the remaining disk dies during rebuild you'll be f*cked. Any sysadmin taking on such jobs should clarify on the risks before and whose liability that is. Just saying. 😉

  • @skorupion did this get sorted or what? I want to drop it off my radar and move on.

  • skorupionskorupion Services Provider

    @AuroraZero said:
    @skorupion did this get sorted or what? I want to drop it off my radar and move on.

    Yeah fixed itself, and was resynchronizing.

    Thanked by (2)AuroraZero AlwaysSkint

    Crunchbits Technical Support, Technical Writer, and Sales
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  • @skorupion said:

    @AuroraZero said:
    @skorupion did this get sorted or what? I want to drop it off my radar and move on.

    Yeah fixed itself, and was resynchronizing.

    Ok 👍 off to do some writing.

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