About the discrepancy between GUI and crcontrol command in reporting free space

[ddm2]

I read this TECHNOTE:

http://www.symantec.com/business/support/index?page=content&id=TECH147484

Netbackup GUI and Disk Pool Report subract more or less 10% of the disk pool available space, preventing backup from starting if that limit is reached.

Do you think this a good policy? I have a 32 TB disk pool: on my case, backups can't start even if I have 2.5 TB available.   

Please share your opinion.

Thanks

[Will_Restore · Accepted solution]

"NetBackup subtracts aproximately 10% of the available space in the MSDP disk pool for Metabase functions and to prevent the disk pool from filling up while backups are still running to it."

On the surface it seems wasteful.  But it serves to protect system from corruption. 

In that light I'd say it's a good policy. 

[Mark_Solutions]

I agree with wr - it does seem very wasteful, especially when using a 32TB volume (will be worse when it is 64TB iin 7.5) but the system has its reasons for doing this and presumable there is a lot of internal processing that can use a lot of this space

The last thing you want is any corruption in this area so it is just something we have to live with - a little like Windows takes a hefty percentage when you format a volume.