System volume root's usage is 100% and /dev/md0 is using all 4G

---

Craig_X wrote:

 

 

root@PRANAS-TNG:/# find / -xdev -type f -size +100M
/var/cores/core-readynasd
/media/USB_HDD_11/Pat/ATCO/ATCO DATA/pvranchad_book.xml
/media/USB_HDD_11/Pat/ATCO/ATCO DATA/PVRanchAD (1).xml
/media/USB_HDD_11/Pat/ATCO/ATCO DATA/pvranchad_pax.xml
/media/USB_HDD_11/Pat/Aerial Footage - Max/Princeville Ranch Cut 3.mp4

  

---

You can delete /var/cores/core-readynasd for sure.

You can also remount the root file system, so you can search through it without mount points from muddying the water.

To do this you enter

mount --bind / /mnt
find /mnt -xdev -type f -size +100M

...

In addition to searching, etc you also would delete files directly from /mnt.  

Maybe also try 

mount | grep -i USB_HDD_11

That should let you know if USB_HDD_11 is a mount point or just a folder.  It you don't see it in the output of the above command, then it is just a folder.  You can delete it's contents if you wish, but perhaps keep the folder itself.

When done, you unmount with umount /mnt