Comment 9 for bug 252047

I can't believe that there's a modern system that still has the 1024 cylinder limit as that would mean that any Windows install would randomly die when a boot file moved above that point. I'm thinking that this problem was actually due to the fact that the partition started beyond 219 GB and grub had been using HDIO_GETGEO, which can't report a start larger than that. Bug #1237519 fixed this, so I think it may have fixed your issue as well. Can you see whether this is still a problem in the Trusty nightly? I'll see if I can reproduce it in a VM.