HDD 4 sections with one letter on the 1st physical disk wtf???

Question

System administration

Greetings comrades, in the age of fashionable libraries, frameworks and other tinsel, you rarely come across hardware ... But even so, I had to touch it.
Given: there is one physical screw for 750 GB and it is marked into 2 volumes / partitions, but for some reason, through the dispatcher, it is shown that it is supposedly divided into 4 sections with 2 letters, those are like 2 sections for each letter.

I think what the hell is that, I demolish the L disk and expand D .... ummm it became even more incomprehensible what the hell is going on here ...

Comrades tell me what the hell is this and what is it called?))) Well, how can I do all this one normal partition without a sort of pseudo-division into 4 volumes ...
PYSY: this is a laptop, Windows is on another SSD, I have 2 drives in the Senks
laptop

Answer 1

Someone converted the disk to dynamic, and then combined the partitions into stripes.
EMNIP, back only through the demolition of partitions, transferring the disk to basic mode and creating new partitions.

Answer 2

judging by the color, these are dynamic disks