Deletion of old data
Stopping of services
systemctl list-units --type=service --state=running #to see all the running servicessudo systemctl stop docker.service
sudo systemctl stop docker.socket #Stopped docker services and socket, which also means immich is stopped
sudo systemctl stop smbd.service #stopped samba
sudo systemctl stop syncthing@pubuntu.service #syncthing is stopped to not try sync empty folder to a backup location
sudo systemctl stop jellyfin.service #Stopped jellyfin server
sudo systemctl stop transmission-daemon.service #Stopped transmission-daemon[//]: What is a [daemon]?
Destroying the RAID configuration
cat /proc/mdstat #To check the status of RAID made by mdadm, the device name was /dev/md0
lsblk #to find the mount point, mounted at /mnt/nas
sudo umount /mnt/mas #Unmount the device
sudo mdadm --stop /dev/md0 #Stop the RAID 5 configuration
cat /proc/mdstat # To check the status of RAID, it's gone - shows no activre raid
lsblk # To check if the drives are assembled individually
sudo mdadm --zero-superblock /dev/sdb
sudo mdadm --zero-superblock /dev/sdc
sudo mdadm --zero-superblock /dev/sdd # To permanently wipe the RAID signature from the drives
sudo mdadm --examine /dev/sdb
sudo mdadm --examine /dev/sdc
sudo mdadm --examine /dev/sdd # This examines the drive for any metadata, it returns, "No md superblock detedcted on <drive>"Final cleaning of data and filesystem
lsblk -o NAME,SIZE,TYPE,MODEL # Provide info on the disks, helps to identify the os disk and other drives MUST NOT TOUCH OS DRIVE
sudo wipefs -a /dev/sdb
sudo wipefs -a /dev/sdc
sudo wipefs -a /dev/sdd #Wipe all the data
lsblk #check the status again, however it is cleanThe drives are now clean
sudo shutdown -h now #Shutdown to replace the drivesInstallation of new OS
Installed the OS in SSD, formatted the drive in ex4 filesytem and mounted them in three separate places.