Comment 8 for bug 457283

I'll point out, that at least in the lucid version of eucalyptus, there is valid data stating where the ephemeral storage is in the metadata service. So, if the image is set to query metadata service for the ephemeral device, then this will work properly.

I know, its a layer of indirection, but it does work. bug 513842 has more info (and an issue with that block-device-mapping that is provided).