Flush Compiled Templates Migration File breaks Craft Migration Setup from 3.0 to 3.3
rmdir(/app/b4mhz722nsjh4/storage/runtime/compiled_templates/f1): Input/output error


If Craft or PHP tries to delete a folder that doesn't exist, it won't fail, but will gracefully continue execution.

That error is an underlying operating system error that suggests there might be some probably with your disk:

https://askubuntu.com/questions/325343/unable-to-delete-file-rm-cannot-remove-input-output-error

https://askubuntu.com/questions/74105/how-do-you-repair-an-input-output-error-in-an-ntfs-partition

Craft attempts to clear the compiled templates folder at the end of an update, so the good news is, for all practical purposes, the update probably completed successfully.