How Do I Install Linux for a Dual-Boot Setup on a Second Drive?

If you want a clearer view of the disks and partitions, a bootable partitioning tool such as GParted can show whether you have two drives or one drive split into multiple partitions. It is useful for inspecting the layout, but be cautious with any operation that deletes or reformats partitions.

First confirm whether D: is actually a second physical drive. Windows assigns letters to partitions, so D: might just be another partition on the same disk. If it is a separate drive and you choose it as the Linux target, the installer will normally create the required Linux partitions there, but you should assume its existing contents will be erased. Back up anything important first. Windows can remain on the first drive, and the boot menu should let you choose Windows or Linux at startup.