Proper sector alignment provides the best performance, and making partition sizes even multiples of 4K bytes helps to ensure alignment on drives with either 512-byte or 4K-byte sectors.
Generally, using partition sizes that are even multiples of 1M or 1G is the easiest way to make sure every partition starts at an even multiple of 4K.
-There is one exception: the _freebsd-boot_ partition should be no larger than 512K due to current boot code limitations.
+There is one exception: a _freebsd-boot_ partition for legacy BIOS booting should be no larger than 512K due to current boot code limitations.
+This limitation does not apply to UEFI booting.
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A `Mountpoint` is needed if the partition will contain a file system.