I lost free space with rootfs, what is the reason?

Question

linux

Here's the trouble.
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mtdblock1 7708600 7318916 389684 95% /
100 percent used before. Released 5 percent. after cancellation of reservation. Well, the place continues to slowly decrease. After ribut, the place does NOT increase. There are no files other than system files in rootfs. All on mnt hdd.
The problem is I hope I sleep. But the most interesting thing is that rootfs itself, by the standards of ncdu, weighs less than the occupied space.

Answer 1

Or maybe not all partitions have been mounted - /tmp /var
, maybe they will use the space of the root fs because they did not connect as a result of an error.

Answer 2

starting from the root
and so go deeper into suspicious directories