HWM - and Error 129

HI,

We have NBU 7.1.0.4.

Master + Media-SErvers: Win2008 R2

I have a missunderstanding of the High Water Mark for my Advanced Disk Pool.

If the HWM is reached, all backups ends with Error 129 until the image cleanup created futher space????

Is that right?

Kind regards

Dirk