1.1 Don't use FAT filesystems to host VDIs on XP. In my early experimentation with Virtual Box, I installed an Ubuntu 8.04 image on an XP FAT Filesystem. On my Dell, I came across an instance where the update manager claims to have run out of disk space. This is almost certainly because I have mounted the VDI on a FAT32 file system. I have created a volume of max size 32 Gb volume. This will probably fail when virtual box attempts to exceed the 32 bit word size limit. Changing the filesystem to NTFS made this problem go away. I used the microsoft utility to do this. See {link:...Convert FAT disks...|http://technet.microsoft.com/en-us/library/bb456984.aspx} at Microsoft's site, and {link:External Disk on the Dell|space/Dave/No_50/External+Disk+on+the+Dell} here. I originally documented this on this snip but removed it when I made this comment.