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The du command reports a total size of 276G for my /var/lib/docker. However, the df command says that the actual size of the device where / is mounted is just 219G.

Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb2       219G  185G   24G  89% /

How is it possible to have a directory whose size is higher than the reported size of the device it is mounted on? I can understand this.

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  • what's the result of df /var/lib/docker
    – Jaromanda X
    Commented Jul 31, 2023 at 8:33
  • /dev/sdb2 219G 185G 24G 89% /
    – hlfernandez
    Commented Jul 31, 2023 at 8:35
  • OK, just making sure /var/lib/docker is not a different disk/partition :p
    – Jaromanda X
    Commented Jul 31, 2023 at 8:37
  • How do I check that? The full df just says that /dev/sdb2 is mounted on / and the other disk (/dev/sda1) is mounted on /home. Therefore I assume that /var/lib/docker must be mounted on /dev/sdb2.
    – hlfernandez
    Commented Jul 31, 2023 at 8:46
  • Check here: unix.stackexchange.com/a/45773/101265
    – Romeo Ninov
    Commented Jul 31, 2023 at 8:47

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