I just picked up 3 wd1200JB's and am experiencing some weird issues. When I use fdisk to setup the drive it shows a % under the partition. Also the format displayed in fdisk when I set one up is 3UNKNOWN not fat32. what is 3unknown? When setting the whole drive as a extended partition it says 71% not 100%. The guy I got them from said they were from a Mac pc. I have an Intel based system. I set on up using Partition magig and it says 3fat32 not fat32. Is there a mac format left on these in the MBR or is it a virus? I have tried wd tools, partition magic and fdisk. I can make them work but I think the mbr is showing something left over from the mac format. Also I am only getting 114gb out of them. any ideas? Update: I also found out they were used in a raid system. Would that alter the MBR? How would I reset the drive?