scylla_io_setup condition for nr_disks was using the bitwise operator (&) instead of logical and operator (and) causing the io_properties files to have incorrect values Fixes #7341 Reviewed-by: Lubos Kosco <lubos@scylladb.com> Signed-off-by: Shlomi Livne <shlomi@scylladb.com> Closes #8019