I have 2 SATA HD drives, 320G and 500G with Raid 0+1 setup.
I plan to remove the 500G and replace with a new 320G drive.

Can I do this?

1. take out 500G drive
2. put in 320G drive
3. with live DVD bring up Ubuntu 9.10
4. run dd if=/dev/sda of=/dev/sdb (take hours to run)
5. remove 9.10 DVD
6. reboot

Thanks