On Thu, Oct 23, 2014 at 11:05 PM, Steven Haigh <net...@crc.id.au> wrote: > On 24/10/2014 1:59 PM, Orion Poplawski wrote: >> >> What do you have against partitioning the disk? Loosing the 512-bytes >> for the partition table? > > On some setups it can cause major write degradations in the virtual machine. > > If you can imaging the disk being set up in 4Kb clusters - which LVM > then adheres to - but on the DomU disk with a partition, the alignment > for partition data is now 0 + 512 bytes instead of 0. > > This means a write of 4Kb would write two sectors to the physical disk > (first being 512 bytes + 4Kb, the second being the 512 bytes that give > us an offset).
Modern fdisk starts partitions at 2048 and not 512.
