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The Wikipedia article for GUID Partition Table does not make it clear whether it is aligned to an underlying 4k-block filesystem. Seeing as the diagram shows the first block of the data sector as block 34, which is not divisible by 8 (512 bytes per sector * 8 sectors = a 4k block) then I am inclined to say no. Even if Windows makes the first partition a Microsoft Reserved Partition, as it apparently does usually, that partition is 65536 blocks (32 MiB), so still 65536+34=65570 which is not divisible by 8.
Am I missing something?