|I installed windows xp I didn't partition anything |
You must have done. You cannot install anything until the drive is partitioned and formatted, even if it just one partition spanning the entire disk which what you appear to have done.
The same goes for the second drive. That must be partitioned and formatted before it will be recognised in Windows Explorer. You can partition and format the drive from Computer management > Disk Management. The drive will show up as unallocated space.