How to create software raid1 mirroring in Proxmox PVE

These instructions below will show you how to create software raid1 (mirroring) in your proxmox pve. The example below uses 2 hard drives in /dev/sdb and /dev/sdc (yours may be different).

 

apt-get update 
apt-get upgrade

apt-get dist-upgrade

apt-get install mdadm

modprobe raid1

                        (do not need to add to /etc/modules)

cat /proc/mdstat

Prepare partitions to Linux Raid Auto-Detect:

fdisk -l

fdisk /dev/sdb

    type fd  (linux auto raid)

Copy partition from one drive to another

sfdisk -d /dev/sdb | sfdisk --force /dev/sdc

Remove previous RAID data if any:

mdadm --zero-superblock /dev/sdb1

mdadm --zero-superblock /dev/sdc1

Create the array with missing disk

mdadm --create /dev/md0 --level=1 --raid-disks=2 missing /dev/sdb1

Create the array with both disk

mdadm --create /dev/md0 --level=1 --raid-disks=2 /dev/sdb1 /dev/sdc1

-----------------------------------  (if using LVM stop here - continue to: https://sites.google.com/a/datafeedfile.com/code/proxmox/proxmoxrecreatelocalmd0lvm2basedsharedlocalfilesystem)

Create the filesystem

mkfs.ext4 /dev/md0

Double check to make sure all okay:

cat /proc/mdstat

Create mount target

mkdir /mnt/md0

chmod -R 777 /mnt/md0

Edit fstab

blkid

nano /etc/fstab

UUID=<UUID> /mnt/md0 ext4 defaults,noatime,nodiratime,noacl,data=writeback,barrier=0,nobh,errors=remount-ro 0 2

mount -a

reboot