Is it RAID or not?

Question

Iron

Hey!
There is a computer at the remote site. Who put ESXi on it - I have no idea. Access only via https to the ESXi interface.
I asked a remote employee to show the contents of the system unit via WhatsApp - there are 4 identical terabyte TOSHIBA DT01ACA100 motherboards asus b150m-c.

I'm not very familiar with ESXi and would like to know if it's RAID or what?
The RAID controller is not visible on the motherboard.

If you go to the ESXi datastores menu, there are some 3 Datastore pieces with different names.

Enlighten please. I do not understand - 3 pieces of datastore for 900+ gigs, and there is a difference in size. And hard disks - 4 pieces.

Answer 1

I would say offhand that it doesn't exist... you
can see 4 ATA disks... most controllers don't allow ESXi to see exactly the disks, making it possible to connect only an already assembled array.
if so, then one datastore should be slightly smaller, with equal disks, since ESXi partitions actually live on it ...
on the board itself, as far as I can see, there is no "hardware" raid chip, and it usually does not make friends with soft ESXi.
there is only one question, where is the 4th disc?
or dead/not connected
or not added to the datastore.
try from the last one, perform the operation of adding a new datastore, if the disk is found, then it is connected, but forgot to add.

Answer 2

So far, you can see that you have 4 disks and 3 partitions.
Maybe two disks are mirrored for one of the partitions, or one of the disks is not used.
Click in the stores themselves, for example in datastore1 or main, and look at what they are made of

Answer 3

no raid here. on one of the disks, the datastore is simply not created