System volume 'root' usage is 95% (/dev/md0)

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nicolas68 wrote:
Can I do something without formatting?
If no, will a format solve my problem?
Is it dangerous to leave it like this?
Thanks again for your time, have a nice day.

Nicolas

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It is dangerous to leave it like this.  If the OS partition completely fills the NAS will become totally inaccessible.  It'd still be possible to fix it using tech support mode, but it would be better to deal with it now.

I am not sure what you mean by "format", but I am guessing you mean a NAS factory reset. That would fix it, but you'd need to totally rebuild the NAS, reinstall any applications, and restore the data.  If you reinstall the same add-ons you have on it now (in the same way) you will end up with the same problem.

The key is that add-ons that use a lot of disk space (or which create a lot of files) need to be installed so that their data folders aren't on the OS partition.  One way to do this is to find those folders, and copy them to your data volume.  Then delete the folder on the OS partition and create a symlink to the data volume copy.   You'll probably need to stop the add-on from the command line before you do this (and start it afterwards).  Often the add-on data folders can be configured (exactly how depends on the add-on).  So that is another way to work around it.

Apps intended for OS6 NAS should put their data in \data\.apps (which is on the data volume).  Perhaps research what apps are available from rnxtras.com, and see if there are any you can use.  Then you could uninstall what you have now, and switch over to ones that minimize their OS partition use.

If you make a mistake, you can brick the NAS (forcing a factory default), so you should make sure you have an up to date backup first.