Disk 1 and Disk 3 show the same drive letter (X:) and name My Disk.
Something weird there. Looks like they are setup in some kind of RAID array.
Also, you show a B: drive which is unusual as well. B: has always been associated with a 2nd floppy drive/Hard drives typically are assigned C: through Z:, not A: or B:.
Disk 1 and Disk 3 are setup in RAID 0 via Windows (soft raid).
B is just the drive letter I chose for my Backup drive.