Can't create a file, what should I do if touch fails?

a The disk is full
b. The disk is broken.
c. The inode node is full.
d
. There are too many bad sectors on the disk. e After deleting the file, the inode and space are not released. ----How to do: Find out the PID of the deleted process, kill this PID directly, and release the space and inode number immediately.