I am having a problem with two mount points in a tsm server.

The tsm server is connected to a tape library of 4 drivers.  When I input query 
mount there are always two moint points in RESERVED status:

ANR8376I Mount point reserved in device class LTODEV, status: RESERVED.

ANR8376I Mount point reserved in device class LTODEV, status: RESERVED.

The problem is that there are only 4 drivers, but 2 of them are unable to be 
used because of this situation.  Most of the backup sessions stay in "Waiting 
for mount point" for long time.  I have tried by restarting the Storage Agent 
service of all the client servers  but the situation remains the same.

I have checked the activity log, but there is nothing strange.  It is not a 
hardware problem because the 2 drivers that become unable for this problem are 
not always the same

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