Thank you very much all commenting my problem.Now I have 
idea what can I do and can't. I have increased disk pool to 6GB yesterday and 
everything went well. 
Best Regards, 
Burak 




        Wanda.Prather AT JHUAPL DOT EDU 
        Sent by: ADSM-L AT VM.MARIST DOT EDU 
        
        28.01.2002 20:28 
        Please respond to ADSM-L 
                        
                        To:        ADSM-L AT VM.MARIST DOT EDU 
                        cc:         
                        Subject:        Re: disk pool problem tsm 4.2.1.9

Hi Burak, 

You can prevent clients from accessing tapes directly:
update node ** MAXNUMMP=0 

This prevents the node from grabbing a tape drive for backup or archive (it
can still get a tape for RESTORE or RETRIEVE). 

However, with MAXNUMMP=0, if there is not enough space in the disk pool when
the client tries to back up, then the backup will fail! 

So, first try these things: 

*       Set your migration threshhold LOWER than 60%, so migration will
start sooner.
*       Try to reschedule your client backups so there is more time for
migration to clear out the disk pool before the next client starts.
*       Add space to your disk pool.