Microsoft customers have reported problems with the boot.win files on the headnode may grow excessively large after the deployment of SP1 on top of HPC Pack 2008. In this regard, the fix is designed to integrate exclusively with HPC Pack 2008 SP1. Apply this update to the headnode to prevent this issue from occuring. If "boot.wim" file (in %CCP_HOME%\data\ directory) has already become large (over 200 megabytes) the following additional steps are necessary: 1) Locate media, or file share, that you used to capture deployment image 2) Copy boot.wim file from original location, and replace boot.wim file located in %CCP_HOME%\data\... 3) Open HPC Cluster Manager 4) On 'Configuration' tab, select 'Configure your network' To-do List entry 5) Change network topology (to something other than what you actually have, such as 'public only') and complete wizard. 6) Select 'Configure your network' entry, and set network topology back to appropriate selection and complete wizard. 7) Your boot.wim file will now be repaired. Ensure that you’ve applied this update so that it doesn’t grow excessively again.
More info: Download