I currently am having the same issue with an HP 4545s. The image size is about 250GB for some reason there is no compression. After realizing this i made my partition 22GB and set sysprep to expand the partition after imaging. Even with a 22GB image when i upload it uploads a 250GB image. This is with the partition set to single disk multi partition. If i set it to single disk single partition, it still makes a 250GB partition and the partition format is raw... I am going to try setting up a 10.04 with fog v0.29 to see if it is an issue with fog. I have previously done other machines on 0.29 successfully but my company switched to the 4545s at the same time we updated our fog server. The old machines are offsite so I have no successful machines to compare on the new version of fog.. I'll repost later today to let you know.