Hi @kimikitae, thank you for your PR!
What index error did you encounter specifically? Was it an out of bounds error?
I will have a look soon to see if it works on multiple zone sizes, nr zones.

Hello ~!! @Krien thank you for your reply, but my pr may be wrong. Feedback is always welcome.
(I accidentally closed the pr and reopened it by clicking on it. don't worry)

in zns-tools.nvme/plot.py
in line 75, 76, 143, 188, 253, 254

i fixed code like this :
[-1, -1 - val] => [-1 - val//dimension, -1 - val%dimension]

if nr_zone is 64 or 100 => your code work good, because 'difference' variable's value is 0.

However, it was confirmed that it does not work well when the value of nr_zone is not a square number and the value of the 'difference' variable is derived larger than the 'dimension' variable determined at the same time.

example :
If nr_zone is 105. In an array of size 11 by 11, 16 spaces must be set to none. In that case, your code may generate an error where the index is exceeded.

Also thank you for your contribution. I hope the tool will be valuable in your work.