Hey Gang-- Had the SSD for 9 months on this system; all firmware is up-to-date and running on a Dell 490 with W7. Checked all connections and re-seated everything. Attempt to boot this a.m. and bios can't find drive (latest bio since SSD installed). System has a second drive (velociraptor) for data, primary drive only used for OS. Drive only held about 20GB and I've used the optimizer on a weekly basis. No changes to hardware in months. Please advise. TIA, V