I was having some errors with Windows and was worrying it was my hard drives. I have them set up in RAID 0 (2x120GB), so I ordered a 250GB drive to use for a backup. Onece I fixed the errors, I partitioned and formatted it, then ran Norton Ghost and cloned the partition. I now have a perfect backup of my 175GBs in less than 2 hours. I can now run incremental backups of the data to keep thing current.

You can do that with Drive Image XML, which is free, if you don't have a copy of Ghost.