I’m looking for the correct command to create partitions aligned correctly.
I normally do this using “diskpart” after booting a Windows 10 install disk and running command prompt.
The Windows command would be simply create partition using diskpart for a 250gig primary partition.
And then extended plus logical
You’ll find barely any mention specifying by command starting a partition on a particular megabyte. Yes, it’s a maybe not terribly rare scenario but when you do this means that there can be problems of alignment.
You’ll find other recommended or commonly used parameters like how to automatically align with the beginning or end of free space and whether to automatically fill all free space. All these settings would ensure that you utilize all available free space and automatically make adjustments for the size of your sectors.
And,
For a lot of people the GUI tools like Parted and GParted are so easy to use and assure an optimum result, unless you do a lot of partitioning to keep up your skillset, you’ll probably find it easier and better to use a graphical tool.