Thanks Eric. Here is the original thread (see also the replies). https://lists.fedoraproject.org/pipermail/devel/2011-October/157618.html In theory I could test this up to ~ 2**63, but it requires a number of bugfixes and changes in qemu. Obviously that size is ridiculous :-) but it may reveal bugs that wouldn't be found by ordinary testing. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html