"J. Lewis Muir" <jlm...@imca-cat.org> writes: > On Sat, Aug 25, 2018 at 7:40 PM Greg Troxel <g...@lexort.com> wrote:
>> So yes, if you use MBR, make the NetBSD partition start at a mulitple of >> 64. Then, within disklabel, make every partition start at a multiple of >> 64. > > Thank you for your reply! Sorry to reply to this so late, but I don't > understand why everything should start at a multiple of 64 sectors > instead of 8 sectors? Shouldn't it be a multiple of 8 sectors because > 8 sectors * 512 bytes/sector = 4096 bytes which aligns with the > underlying actual disk's 4K-sized sectors? You are not confused; multiple of 8 will work. But a multiple of 64 is necessarily a multiple of 8! However, long ago, 1 sector alignment was good enough. Now it's 8 sectors. So I am recommending aligning to 64, so that even in the future it will be ok, and because wasting that many sectors is of no consequence. That said, I can remember 2.5MB disks, and that's only 5000 sectors...
