ทำ RAID 1 ด้วย mdadm บน Fedora 35

>> sudo mdadm -E /dev/sd[a-b]
mdadm: No md superblock detected on /dev/sda
mdadm: No md superblock detected on /dev/sdb

>> sudo fdisk /dev/sda

# Enter following commands
n # create new partition
P # create as Primary
1 # select partition number
[hit enter button] # select default size (first)
[hit enter button] # select default size (last)
t # change partition type
fd # change to Linux raid autodetect
p # print info to check
w # save setting

>> sudo fdisk /dev/sdb

# repeat command in step 3

>> sudo mdadm -E /dev/sd[a-b]
/dev/sda:
   MBR Magic : aa55
Partition[0] :   1953523120 sectors at         2048 (type fd)
/dev/sdb:
   MBR Magic : aa55
Partition[0] :   1953523120 sectors at         2048 (type fd)

>> sudo mdadm --create /dev/md0 --level=mirror --raid-devices=2 /dev/sd[a-b]1
>> sudo mkfs.ext4 /dev/md0
>> sudo mkdir /mnt/raid1 # change "raid1" to whatever name you like
>> sudo mount /dev/md0 /mnt/raid1/

# append "/dev/md0                /mnt/raid1              ext4    defaults        0 0" to /etc/fstab
>> echo '/dev/md0 /mnt/raid1 ext4 defaults 0 0' | sudo tee -a /etc/fstab

# update mdadm config
>> sudo mdadm --detail --scan --verbose | sudo tee /etc/mdadm.conf

# check RAID status
>> sudo mdadm --detail /dev/md0

>> sudo chown root:kpping /mnt/raid1 # change "kpping" to your owner group
>> sudo chmod g+rw /mnt/raid1

>> sudo dracut --regenerate-all --force

# reboot system and enjoy