We are planning to upgrade IOS of Cat6513 switch with Sup720 and MSFC3 in future. Because of the limitation of room,we use CF card to keep the original image right now. I also checked the topics of Cisco forum and Cisco documentations.If the image is only in the CF card, the system would get into Rommon mode when we reload Cat6500 because SP could not recognize disk0 or disk1. I have to copy the new image to sup-bootflash.Is it correct? But the sup-bootflash is only 64MB in our environment (I think it is reason we use CF card), how does it work? I would appreciate it if you could give me two cents about my puzzle.