- Downloaded the "Update for ZENworks 11 SP2 (11.2.1)" on 07/04/2012
- Replication Status shows 100% on all Primarys
- Deployed the Update with success to the Primary Servers yesterday
- Deployed the 11.2.1 Agent with success to one Client yesterday

=> Looking into System Updates today the Status of "Update for ZENworks 11 SP2 (11.2.1)" shows "Error".
The Error is: "Cannot download update due to insufficient storage space on download server."

OK there is only 3,5GB free space on the Download Server, but what he wants to download now?
The system-update/5011020100fc50000000002012063009 folder contains 463 files with 2.700.283.905 Bytes.

I'm a little bit confused about what is going on here?