I have an ocz vertex 2 boot ssd and a WD storage hdd. This setup worked fine on my old computer. My new computer can only detect one drive at a time. If both are connected only the WD drive shows. I can boot from the ssd if it's the only drive. I tried on a different computer and sometimes both drives are detected in bios but I can only choose the WD in the boot menu. Both computers use MSI mobos and are at latest FW. Both have corsair 600W psu's. Tried different data ports. Some detects both, some don't.