Interrupt `mv` command by ctrl+c, and disk space is lost

Question

To transfer large amount of data, I used mv from the first HDD called /KRX to other HDD called /data_tmp.

But I interrupted the mv process using Ctrl+C, and I fill /KRX with other data.

Then when I inspect the disk space via df -h I have the following

df -h 

Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb        7.3T  7.2T     0 100% /KRX
/dev/sda1       3.6T  3.4T   46G  99% /data_tmp

When I remove or move some files in /KRX, still it shows Avail 0 whereas Used decreased from 7.2T to 7.1T as follows:

Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb        7.3T  7.1T     0 100% /KRX
/dev/sda1       3.6T  3.4T   46G  99% /data_tmp

So how to resolve the zero Avail?

I used Ubuntu 18.04.5 LTS.

Thanks.

Answer 1

I found a solution.

I just set zero reserved-blocks as follows:

sudo tune2fs -m 0 /dev/sda

Then df -h shows

Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb        7.3T  7.1T  132G  99% /KRX