Data block usage space

My single pool was composed originally by two disks but recently I add a new disk to the pool, after some time the btrfs started to force the read only access to the pool. At first I didn’t understand the problem but after some reading and some commands I found out that probably the data block is full.

I’m trying to resize and increased the but I still haven’t found out how, can someone more experienced give some pointers?


Forget about it, my problem was something else.