A desktop system had two drives (Assigned C and D, which were enumerated in Disk Management as Disk 0 and Disk 1). A new SSD was added as the boot drive, after copying the C drive to the SSD. The SSD was connected to SATA 0 (master) port on the motherboard. The previous C Drive was moved to SATA 2 and is reformatted as a non-booting NTFS partition. The D drive remained on SATA 1.

The system boots and everything seems fine. I was able to manually adjust the Drive Letters. However, the list in Disk Management is re-ordered. Disk 0 is the the previous Disk 2 (D Drive) on SATA 1, Disk 1 is the new Boot Drive (now C) on SATA 0, and Disk 2 is the former C Drive (now assigned E) on SATA 2.

Does the Disk 0, 1, 2, designation mean anything? I would prefer to have them display in Disk Management as Drives C, D, and E from top to bottom. Is the Disk enumeration based on the SATA port or something else? (If it was based on SATA Port, they should be ordered C, D, E. Is there any way to re-order the Disk number assignments? What actually does determine the Disk number enumeration?