This turns out to be a bit deeper of an issue than anticipated; we're
using parted to create a partition/filesystem during image conversion
time for KVM.  parted currently does not support the creation of an ext3
partition using mkpartfs (and, since the partition is in the middle of
the disk image, we cannot use 'mkfs.ext3'/etc since these tools do not
support offsets).  We're avoiding the use of loopback devices to
mitigate the chances of hitting a race (no atomic 'get a free and attach
loopback device).  We're looking into this problem in order to determine
if there is solid mechanism for creating an ext3 filesystem in the
middle of a large disk file.

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Partitions presented to instance should be ext3, not ext2
https://bugs.launchpad.net/bugs/457281
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