block/vpc: Fix conversion from size to disk geometry
The VHD algorithm calculates a disk geometry which is usually smaller than the requested size. QEMU tried to round up but failed for certain sizes: qemu-img create -f vpc disk.vpc 9437184 would create an image with 9435136 bytes (which is too small for qemu-img convert). Instead of hacking the geometry algorithm, the patch increases the number of sectors until we get enough sectors. Cc: Kevin Wolf <kwolf@redhat.com> Signed-off-by: NStefan Weil <weil@mail.berlios.de> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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