php file put contents inode problem

1#if you have enough disk space(df -h) and inode space (df -i), the
2#folder with lots of files, "cache" folder in this example, may be 
3#messed up and will likely be fixed with:
4mkdir cache_new   
5chmod ugo+rwX cache_new 
6mv cache cache_old  
7mv cache_new cache  
8rsync -av cache_old cache/