Converting File Systems - Paiet/Tech-Journal-for-Everything GitHub Wiki

Create an EXT2 file system
- fdisk /dev/sdb
- mkfs.ext2 /dev/sdb1
Convert to EXT3
- tune2fs -j /dev/sdb1
- Can be done online, but a remount is typically required to take advantage of new features
Convert to EXT4
- For live file systems
  1. Change FSTAB entry to show EXT4
    - EXT3 can be mounted as EXT4
    - sudo vi /etc/fastab
  2. Boot to single-user mode
    - sudo systemctl rescue
  3. Mount the file system read-only
    - sudo mount -o remount,ro /
  4. Continue with the steps for non-live file sytems
- For non-live file systems
  1. Unmount the volume
    - sudo umount /dev/sdb1
  2. Convert the volume
    - sudo fsck.ext3 -pf /dev/sdb1
      - Backup and hide the journal
    - tune2fs -O extents,uninit_bg,dir_index /dev/sdb1
      - Enable EXT4 features
      - extents replaces bitmapping
      - uninit_bg allows file checking in the background, resulting in faster checks
      - dir_index enables hashed B-Trees for faster file lookups
    - fsck.ext4 -yfD /dev/sdb1
      - Re-indexes directories
  3. Edit FSTAB to show EXT4
    - sudo vi /etc/fastab
- Only new files will use extents
- Old files still stored in bitmaps
- Use chattr +e <file>
  - lsattr <file> and look for "e"
Convert to XFS
- No supported method
- Create a new volume and copy the data over
- Steps
  1. mkfs.xfs /dev/sdc1
  2. mount /dev/sdc1 /mnt/temp
  3. cp -R /website /mnt/temp
  4. umount /website /mnt/temp
  5. mount /dev/sdc1 /website
Convert to BTRFS
- Similar to XFS in that it is not supported
  1. mkfs.btrfs /dev/sdd1
  2. mount /dev/sdd1 /mnt/temp
  3. cp -R /website /mnt/temp
  4. umount /website /mnt/temp
  5. mount /dev/sdd1 /website
- Add storage
  - btrfs device add /dev/sde1 /mnt/temp
  - btrfs filesystem balance /mnt/temp

Converting File Systems - Paiet/Tech-Journal-for-Everything GitHub Wiki

⚠️ **GitHub.com Fallback** ⚠️

⚠️ GitHub.com Fallback ⚠️