The filesystem “/” mounted at “/” reached “critical” status...

web381user

• August 07, 2024 13:40

Hello

I am receiving notification email:

The filesystem “/” mounted at “/” reached “critical” status because you currently use 94.76% of its available blocks. 

I have checked df -h and here is the output: 

Filesystem      Size  Used Avail Use% Mounted on
devtmpfs         32G     0   32G   0% /dev
tmpfs            32G     0   32G   0% /dev/shm
tmpfs            32G  1,2M   32G   1% /run
tmpfs            32G     0   32G   0% /sys/fs/cgroup
/dev/md2        437G   30G  385G   8% /
/dev/md1        487M  159M  304M  35% /boot
tmpfs           6,3G     0  6,3G   0% /run/user/0

If I try du -h --max-depth=1 / 2>/dev/null | sort -hr here is the output:

158G    /
138G    /home
9,8G    /var
7,0G    /usr
2,7G    /backup
591M    /opt
156M    /boot
67M    /etc
34M    /root
1,2M    /run
320K    /tmp
16K    /lost+found
8,0K    /log
4,0K    /srv
4,0K    /mnt
4,0K    /media
0    /sys
0    /proc
0    /dev

As you can see at the first output, I have 8% usage at /dev/md2 which is my root. So, I dont understand why do I receive these notifications and why I dont have enough space?

Any help?

• 

  Andrew

  • August 08, 2024 06:52

  How about inodes? (i.e number of files). Use the following command to see it's usage:

  df -i

  Andrew N. - cPanel Plesk VMWare Certified Professional
  Do you need immediate assistance? 20 minutes response time!* Open a ticket
  EmergencySupport - Professional Server Management and One-time Services

  0
• 

  web381user

  • August 08, 2024 09:59

  Here is the inodes output:

  Filesystem       Inodes  IUsed    IFree IUse% Mounted on
  devtmpfs        8191462    395  8191067    1% /dev
  tmpfs           8198257      1  8198256    1% /dev/shm
  tmpfs           8198257    788  8197469    1% /run
  tmpfs           8198257     16  8198241    1% /sys/fs/cgroup
  /dev/md2       29122560 287653 28834907    1% /
  /dev/md1         131072    351   130721    1% /boot
  tmpfs           8198257      1  8198256    1% /run/user/0

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• 

  cPRex Jurassic Moderator

  • August 08, 2024 15:51

  Can you check the headers of that email message to confirm it is coming from the same server you think it is?  It's common for older systems to be left online, or a hostname change to happen, and the notification is actually coming from a different machine.

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• 

  web381user

  • August 11, 2024 12:00
  • Edited

  Yes. The headers are fine. All is as it should be. The mail is coming from our server.

  Simply said: free/available/used space is not matching the actual size of the partition.

  I wanted to open ticket, but I cant as my hosting provider is Hetzner.

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• 

  quietFinn

  • August 11, 2024 12:30

  €web381user
  there is something I don't understand in your 1st post:
  df shows that in the / filesystem there is 30G used, but du shows that /home is using 138G,
  that does not make sense...

   

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• 

  web381user

  • August 26, 2024 09:23

  It doesnt matter.

  I have decided to reinstall the server, as CentOS has to be replaced with AlmaLinux.

  Thanks for your answers.

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