ERROR 1010 (HY000) at line 1: Error dropping database (can't rmdir './roundcube', errno: 39).
root@server[/var/lib/mysql]# mysql -e "drop database roundcube";
ERROR 1010 (HY000) at line 1: Error dropping database (can't rmdir './roundcube', errno: 39)
root@server[/var/lib/mysql]#
Reason : Files might be corrupted
Solution : Rename the directory that contains the corrupted files and then recreate the folder "roundcube" with same permission and ownership
Now try to delete the database again.