We have a QNAP NAS (TS-869L with firmware 4.2.2, if relevant) where we backup our data. Last night it completely filled up the drives that are in RAID 5 (ext4).
Now I can cd into the directory but I can't ls or rm any files: doing so hangs the terminal indefinitely, and the corresponding process goes in "D" status immediately:
25709 admin 280 D /bin/ls -F
Is there any way I can remove any file to restore functionality?