Getting the error ORA-27001: unsupported device type

Question

Hi ,
While I am starting to backup via RMAN I am getting the following error. I kept my backup files on my disk and configured the channel as
RMAN> SHOW DEFAULT DEVICE TYPE;
RMAN configuration parameters are:
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
RMAN> restore tablespace user_undo;
Starting restore at 19-DEC-06
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 12/19/2006 17:00:36
ORA-19554: error allocating device, device type: DISC, device name:
ORA-27001: unsupported device type
When I checked in the v$backup_device its giving my the following result
SQL> SELECT * FROM V$BACKUP_DEVICE;
DEVICE_TYPE
DEVICE_NAME
SBT_TAPE
Could anyone please help me out.
Thanks

Answer 1

RMAN> SHOW DEFAULT DEVICE TYPE;
RMAN configuration parameters are:
CONFIGURE DEFAULT DEVICE TYPE TO DISK;
RMAN-03002: failure of restore command at 12/19/2006
17:00:36
ORA-19554: error allocating device, device type:
DISC, device name:> ORA-27001: unsupported device type
Is it possible that you have line similar to the following when you enter
show all;
CONFIGURE CHANNEL DEVICE TYPE DISC FORMAT <path>