|You are using a 160 GB hard drive. So this raises a number of questions:|
1. Does your motherboard BIOS support 48Bit LBA?
2. What SP level is your XP install at?
3. Is this your OS drive?
4. How did you partition the drive? There may be a clue here as to why it is using 127 GB as opposed to 137 GB.
5. Is it the only partition on that drive?
Some answers / pointers to the reasons for the above questions:
In order to use hard drives greater than 137 GB you need your motherboard and BIOS to be capable of supporting 48 Bit LBA.
Additionally WinXP has to be at least at SP1 level.
If the above conditions are not satisfied than you will not be able to use the space above 137 GB disk.
My Website (Homepage link) has additional information on using large disks. It also has additional links to other useful sites that have information on this subject. One particularly useful one is http://www.48bitlba.com/.
☺ When everything else fails, read the instructions.