How to add more disk space to ASM in Windows

 I got an Oracle database through merger which uses ASM in Windows environment. The disk space needs to grow and I have no knowledge of ASM. I need to let the NT engineers know (they are new to ASM too) the drive where the disk space would be added.I do not know how to find the ASM disk to physical disk mapping for WINDOWS. I saw some Unix/Linus commands but not Windows.

This is the information I can gather. But it does not tell me anything about physical drive.

SQL> select name,path,total_mb,free_mb from v$asm_disk;