Greetings people. I got the laptop from a friend to upgrade the disk. He bought this disk http://www.amazon.de/dp/B007HALUSC/...TF8&colid=2DTI36RN2CHJL&coliid=I16EYTRUU30D9X from Amazon. It is a OWC Mercury Aura Pro MBA SSD 120GB. I have followed this guide to replace it: http://eshop.macsales.com/installvideos/macbook_air_0809_ssd_h/ I have the model A1305 of Laptop. What I noticed from the start on the SSD drive that the flat cable that came with it, and the drive is a little bigger that on vide and has not the same label for the drive. I have attached the picture for the drive. The flat cable had to bent to be properly seted in the laptop as on video. But when I boot the Mac does not recognize the SSD. I just get the question inside the square after pressine cmd+r. I can normally boot via use Yosemite installation, but I cannot see the drive. Is there anything to be done?? Some kind of firmware upgrade for this model, or there are some amazon Copies of OWC Mercury drives that are not really drives? Thanks in advance.