I have a Dell XPS 15 and have been using it for some time with the factory HD. I got an SSD to be the primary drive (I have installed in the HD bay) and moved the factory HD to the optical bay. When I start it up it boots from the SSD, as expected, but I had a question:
Is it possible for me to choose to boot from the "old HD" currently installed in the optical bay?
New SSD has Win8 and old HD has Win7.
Update 1: I had tried different options in the bios boot menu, but HDD, SATA and CD/DVD, all boots from the SSD. Perhaps, as said in the comments, the caddy I am using does not allow to boot from it... (?)
Update 2: Apparently this caddy I bought has an issue with booting (http://www.amazon.com/review/R2C6PA7PLAHRRD/ref=cm_srch_res_rtr_alt_3).