Hi all, I'm wondering what are the requirements before one can issue alter database create datafile command. I've lost an datafile and wanted to recreated in a different location, when I issued alter database command:

SVRMGR> alter database create datafile 'G:\Oracle\oradata\mydb\users01.dbf' as
'F:\ORACLE\ORADATA\MYDB\USERS01.DBF';
alter database create datafile 'G:\Oracle\oradata\mydb\users01.dbf' as
'F:\ORACLE\ORADATA\MYDB\USERS01.DBF';
*
ORA-01516: nonexistent log file, datafile or tempfile 'G:\Oracle\oradata\mydb\users01.dbf'


I'm not sure how to fix this, please help me . Thank you