Primary vs (Extended) Logical partition?

[BattleX100]

What is the technical difference between primary and logical partitions? I thought that primary partitions are the ones where an OS can be installed, but I think I was wrong and OS can also be installed in logical partitions.

So what is the difference between the two and why would anyone use one over the other?

 

[SkyNetRising]

Watch the video.
https://www.youtube.com/watch?v=AeUM4kR67XQ

 

[BattleX100]

I actually saw Linu's video before posting here 😛

He talks about partitions in general and short stroking but does not tell in what situation I would use Logical or a Primary partition.

 

[SkyNetRising]

Ok - first thing - primary and logical partitions are concept for MBR disks only.
For modern GPT format disks - all partitions are primary.

Differences between primary and logical:
1st you can boot only from primary partition (i.e. bootloader partition always is primary)
2nd there are limitations of how many primary partitions on MBR disk you can make:
max is 3 primary and 1 extended or 4 primary. So if you need more than 4 partitions on single MBR disk, then you'll have to use extended partition.
http://pcguide.com/ref/hdd/file/structPartitions-c.html