We can see asm files in Oracle ASM disk group without asmcmd. You can run the following query to view files and sizes in all disk groups.
1 2 3 4 5 | select f.group_number, f.file_number, bytes, space, space/(1024*1024) "InMB", a.name "Name" from v$asm_file f, v$asm_alias a where f.group_number=a.group_number and f.file_number=a.file_number and system_created='Y' order by f.group_number, f.file_number; |