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linux:notes:ext4 [2026/04/29 16:04] Sean Rhonelinux:notes:ext4 [2026/05/15 09:28] (current) – [fstab] Sean Rhone
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   sudo mkfs.ext4 -D -L 'NAS' -O 'fast_commit' -v '/dev/sda'   sudo mkfs.ext4 -D -L 'NAS' -O 'fast_commit' -v '/dev/sda'
 +
 +  sudo e2fsck -D -E 'optimize_extents,inode_count_fullmap' -f -v -y '/dev/sda'
  
 ====== fsck ====== ====== fsck ======
  
-  * :!: Only on **unmounted** partition+  * :!: Only on **unmounted** filesystem
  
   sudo umount '/dev/sdb'*   sudo umount '/dev/sdb'*
  
   sudo e2fsck -D -E 'optimize_extents,inode_count_fullmap' -f -v -y '/dev/sdb'   sudo e2fsck -D -E 'optimize_extents,inode_count_fullmap' -f -v -y '/dev/sdb'
 +
 +  sudo mount '/dev/sdb'
  
 ===== LiveUSB ===== ===== LiveUSB =====
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   sudo dosfsck -a -t -w -v '/dev/nvme0n1p1'   sudo dosfsck -a -t -w -v '/dev/nvme0n1p1'
  
-  sudo e2fsck -D -E 'optimize_extents,inode_count_fullmap' -f -v -y '/dev/sda'+  sudo e2fsck -D -E 'optimize_extents,inode_count_fullmap' -f -v -y '/dev/sda2'
  
 ====== e4defrag ====== ====== e4defrag ======
 +
 +****
  
   sudo e4defrag -v '/dev/sdb'   sudo e4defrag -v '/dev/sdb'
  
-  sudo e4defrag -'/dev/nvme0n1p2'+===== Temp Mount ===== 
 + 
 +  * Before ''fstab'' 
 + 
 +  udisksctl mount --block-device '/dev/sdb' 
 + 
 +====== fstab ====== 
 + 
 +  sudo blkid 
 + 
 +  sudo mkdir -p '/mnt/NAS1' && sudo -e '/etc/fstab' 
 + 
 +<code> 
 +# NAS 
 +UUID=x /mnt/NAS1 ext4 defaults,noatime,nofail 0 2 
 + 
 +# End</code> 
 + 
 +  sudo systemctl daemon-reload && sudo mount '/mnt/NAS1' 
 + 
 +====== Permissions ====== 
 + 
 +  sudo chown -R $USER:$USER '/mnt/NAS1' 
 + 
 +  sudo chmod -R '0700' '/mnt/NAS1' 
 + 
 +====== Safe Unmount External ====== 
 + 
 +  sudo umount '/dev/sdb'
 + 
 +  sudo udisksctl unmount --force --block-device='/dev/sdb'
  
-  sudo e4defrag -'/dev/sda'+  sudo udisksctl power-off --block-device='/dev/sdb'
  
/srv/www/wiki/data/attic/linux/notes/ext4.1777493088.txt.gz · Last modified: by Sean Rhone

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