Most modern disk drives need a partition to be aligned on sector 2048 to avoid writes overlapping two sectors, but for a long time the sector 63 was used by the fdisk utility and distro's installers by default.
This can cause severe performance issues on modern disks. Often they will try to cover up for it in firmware, which means the issue will be still there, but the pain will be just low enough to not really find out whats wrong.
The best solution is to use either GPT/EFI partitions or switch to using LVM since partitions have been an outdated concept for many years now.
On modern distros like Ubuntu the fdisk utility is patched to default to 2048 sectors. But you need to use sector 63?
In fact it does not even allow doing it wrong anymore:
But what if you need to do just this, i.e. to replace a disk on an old raid?
You can give an extra argument to tell fdisk you need the old DOS-style disk block addressing now for a fdisk session!
Quite a few warning messages. Someone needed to be on the safe side?