Hi,

We have a RMAN backup that allocates 7 channels backing stuff to to 7  
different backup disks. Each backup disk is about the same size  
850GB. The RMAN parameter 'maxpiecesize' is set to 16GB for each  
channel. The 'high watermark' setting for each disk storage unit is  
set to 97%. However every time when the backup happens, the capacity  
of one of the backup disks always goes up to 100% even though the  
'high watermark' is set to 97% and all the other disks have plenty of  
space. I did notice though that at the time of that disk getting 100%  
full all the other disks did have a RMAN backup job/channel running.  
Does NetBackup check the disk capacity and the 'high watermark'  
before it starts writing the next RMAN piece? I have been looking for  
a document that describes how NetBackup handles this situation but  
haven't been successful so far. Can anybody kindly share your  
knowledge about this process if you do know?

The environment is NetBackup Enterprise Server 6.0 MP5. RMAN agent  
runs on Solaris 8 box and the master server runs on Solaris 10.

TIA,

Rongsheng
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