I've built a very large initrd containing a full squashfs from a desktop image, and used it to boot a machine over PXE. Unfortunately, casper cannot seem to locate the squashfs, since it's not present on any of the block devices it scans. Is there some way I can force it to check the initrd, or point to a filesystem location there in the bootfrom parameter? I've tried using bootfrom=/ with the casper directory in the root of the initrd, and that didn't seem to work.