Hello i have sony vaio pcg-71312M.the last two months my dvd drive has difficulty to read/write any cd and especially iso (live cd) .i observe that starts and stops ,starts and stop for a long time..sometime success ,sometime fail..i have tried a lot of cd burn programms .but nothing change.I have windows7 on ssd and ubuntu on my second hdd and try both of them but the same situation ..Finally when i boot an iso on usb flash drive,runs perfectly..should i replace my dvd drive?..i dont know about compatibility.thanks in advance and sorry for my bad english