Does removing disk from a diskgroup moves the content to the remaining disks (12c)

Hi,

I need to remove a disk (DATA_004) from DATA diskgroup in ASM, if I use the command below:

 alter diskgroup DATA drop disk DATA_0004;

Will it automatically move the content of DATA_0004 to the rest of the disks (DATA_0001 - DATA_0003) or do i need to manually move all datafiles inside 0004 before executing the drop disk command?

We are in version 12.1.0.2.0

Thanks!