Hello I have a dual boot system with Win98SE and Win2K (SP3). My main hard drive is 60GB, in two partitions, with 40GB for 98, and 20GB for 2K. I also added a 500GB data drive which I got to work by flashing my BIOS (it's a Jetway 830CH motherboard from 2001), enabling LBA, then formatting the data drive within Windows 98 by right clicking on it in the "My Computer" folder. I got Win2K to see the data drive using the EnableBigLba tool from http://www.48bitlba.com/tools.htm. It's connected to the motherboard via IDE. I have been unable to partition it because FDISK wouldn't recognise the drive's capacity correctly and Partition Magic 8 simply refused to work (I forget the exact error message). So it's in one big 500GB partition right now which I'm concerned about because I've heard of data corruption when drives gets fuller than 137GB. Having been through the steps I've been through is that a valid concern? Is there anything else I need to do? Is it vital I make smaller partitions? Maybe with Gdisk? Would it be wiser to connect it via an ATA PCI card rather than the IDE connector on the motherboard? Also I know 98's scandisk and defrag won't work on partitions bigger than 137GB. Do 2K's CHKDSK and defrag have the same limitation? It's a data drive so it doesn't really get fragmented a lot, but it would be nice to have the option to defrag it. And if 2K's defrag is a no, what third party one would you recommend? Many thanks for any advice, Joanne