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Guide

Nov 03, 2019

Solved

RR2304 - System volume root is 91%.

4x2TB NAS with current OS 6.10.2 reports the same warning message on 91% usage as many other users were facing already. According to the info here I have - turned on SSH Service - turned off AntiVi...

ThomasNanninga
Jan 07, 2020
Finally I could free the OS partition, no more warning messages, thanks for all the help.
I add a small summary of my steps for others that may have a similar problem.

1. Preparations in NAS settings
a. Activate SSH Service with password: System > Settings > Services
b. Turn off AntiVirus

2. SSH login (Windows 10)
ssh root@<nas-ip-address>
Password: NAS Admin password

3. File search
a. Search for any large files >200MB: find /var -type f -size +200M
b. Look into Antivitus definition directory for any temp files: cd /var/lib/clamav
ls -lsh
c. Look into media/USB_HDD_1 (that is my 8TB USB connected HD) folders for any files
Result 3a-c: no large files, no temps, nothing peculiar in USB_...
Some threads can be found here where users had to delete the /clamav tmp files, not in this case.

4. Mount the root partition as mnt to eliminate directories from listing that actually point to the data partition
a. mount --bind / /mnt
b. ls -lsh -> found many chunk-0000x files in the root directory (StephenB telling that this is from PLEX transcoding)
c. Delete files: rm /chunk-00*
Another ls -lsh: all chunk deleted and reduced partition usage from 3,5G to 1G
d. cd //
unmount /mnt
e. Turn on AntiVirus in NAS settings

Retired_Member

Nov 04, 2019

You can search large file in root OS partition,the command as below:

find /var -type f -size +500M

ThomasNanninga
Guide
Nov 05, 2019
Retired_Member wrote:
You can search large file in root OS partition,the command as below:
find /var -type f -size +500M

Btw. that command doesn't find anything, only below 100M you get results.
- StephenB
  Guru - Experienced User
  Nov 05, 2019
  ThomasNanninga wrote:
  
  Retired_Member wrote:
  
  You can search large file in root OS partition,the command as below:
  
  find /var -type f -size +500M
  
  Btw. that command doesn't find anything, only below 100M you get results.
  
  Of course it depends on what the underlying problem is. Often it's one or two oversize files - in which case Retired_Member's command is great. In other cases, it's filled with a bunch of smaller files. Did you look in /mnt/media at the USB folders (after using the mount command I posted earlier)?
  - ThomasNanninga
    Guide
    Dec 16, 2019
    When trying to save on USB disk I had a system crash with subsequent Hardware replacement. That's why I didn't responde for a while. Thank Good I could recover all data except some movies. Alfer having the new system reallocated to Insight I got 87% volume usage.
    The main reason is my Plex application. Out of 1,87GB total I have 800 MB in /data/apps/plexmediaserver/medialibrary/Plex Media Server/Media and 300MB in ../Metadata.
    I could delete the Media Library manually and rebuild it. If that ends in the same result, can't I just source this data out of the root file? Or is that path hard-coded in Plex?