Seagate today confirmed that it's making a 3TB hard drive for late this year. Spokeswoman Barbara Craig didn't provide many details to Thinq but explained that the Constellation disk would need a 64-bit OS that supports long logical block addressing (long LBA) to read the entire contents. Older 32-bit platforms may not see more than 2.1TB due to the original LBA, and Windows XP may not even see 1GB of space.