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On a VM in azure we mount some blob storage via NFS, which generally works good. I now found though, that df reports wrong values for usage of the NFS storage:

root@myVM:~# df -h /mnt/blob/
Filesystem                                             Size  Used Avail Use% Mounted on
storagename.blob.core.windows.net:/storagename/data  5.0P     0  5.0P   0% /mnt/blob

As you can see, it looks like we don't have any data in /mnt/blob, which is wrong. We stored lots of files there. We are running current Debian 11.6 there and used these mount options:

storagename.blob.core.windows.net:/storagename/data /mnt/blob nfs nfsvers=3,nolock,proto=tcp 0 0

Is this

  • related to Azure (mounting blob)
  • related to huge FS (several petabyte)
  • maybe network related (tcp -> firewall?)

Any hints are welcome.

VerboEse
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    Try `df -k` to see it in kilobytes. You have 5 petabytes, so if you have used 5TB this will not be visible with `-h` – Romeo Ninov Feb 07 '23 at 15:36
  • Thanks for the hint, but still no success. The columns for "Used" as well as "Use%" show 0 (0%), even in Kilobyte. – VerboEse Feb 09 '23 at 07:07

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