According to Parts-People information here that is a  Phillips & Lite-On Storage: DU-8A5LH. And per the Dell support page here that is a 9.5mm drive.
Hello, what's the size of Dell Vostro 3458's DVD drive? Is it 9.5mm or 12.7mm? I'm planning to add an SSD, and use the HDD with the help of a caddy. That's why I need to know which size of caddy should I buy. I tried finding the answer in device manual and also on website specifications but couldn't find it. Thank you
Size of DVD writer in Vostro 3458