I just bought a sony 24/12/40x cdrw drive from OD to replace my dead IOmega 12x drive. Everytime i try to burn something everything goes as normal but i noticed the LED on the drive blinks on and off for about 2 secs on and 2 secs off. The progress meter still moves while the light is off and when the cd completes, it is not readable. By looking at the bottom of the cd it looks written so its pretty much a coaster. I used cdrwin, clonecd and nero and all say finished successfully but all are not readable. I noticed during the burn that my HD LED goes crazy meaning it seems like the HD is constatly being read. I tried using my roommates' LiteOn 24x which has the same problem on my comp. I have tried swapping mobo's from a a7v133 to a MSI k7t turbo-r. I use two maxtor 20 GB 7200 rpm HD's in Raid-0 with the onboard raid. This occurs in my dual boot win98 and win2k. I'm thinking its something with my HD's but I would think that the raid is fast enough.