Tape Drives set automatically to 1

Question

Hi all,
After I set some configuration in the "Backup Settings", I found that "Tape Drives" filed is automatically filled with the value: "1". I tested the issue on may machines and the result was the same.
Steps to generate the issue:
1. Login to the Database Control EM as SYS
2. Follow the following links:
Maintenace Tab -> Backup Settings -> Backup Set
3. Set "Maximum Backup Piece (File) Size" to 4 GB
4. Click on "Policy" link
5. Mark the checkbox "Automatically Backup Controlfile ..."
6. Set "Retain backups that are necessary for a recovery .." to 2 Days
7. Click on "OK" button
Now the settings should be saved. Click again on "Backup Settings", you will see that "Tape Drives" field is filled with "1". By the way, NO tape is installed on the machine.
This leads me to many problems. For example, trying to recover a tablespace failed because RMAN is creating channel of Tape type (although I sat Disk as the default channel)
I hope to see any help on this issue here because it caused me many problems.
Thanks in advance.
Oracle 10g R2 on Windows XP SP2.

Answer 1

This is bug 4338664 "EM DBCONSOLE DEFAULTS TO SBT_TAPE REGARDLESS OF RMAN SETTINGS"
Open a RMAN command session and remove the tape setting:
<RMAN Configure CHANNEL device type 'SBT_TAPE' clear;
Werner