Any way to 'upgrade' to RAID 1?

Solution
What OS and current SATA controller mode? It can be done (a complete backup always is highly recommended before making modifications) as long as you set your SATA controller to RAID mode and then add the additional HD or SSD.

Presuming that you use Windows Vista or 7: http://support.microsoft.com/kb/922976

Once in RAID mode, add the new unit and follow Intel's procedure ("RAID Ready" to 2-drive RAID 1). HP provide a good procedure: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01386632&lc=en&cc=no You should obviously install the Intel tools before performing the migration.
What OS and current SATA controller mode? It can be done (a complete backup always is highly recommended before making modifications) as long as you set your SATA controller to RAID mode and then add the additional HD or SSD.

Presuming that you use Windows Vista or 7: http://support.microsoft.com/kb/922976

Once in RAID mode, add the new unit and follow Intel's procedure ("RAID Ready" to 2-drive RAID 1). HP provide a good procedure: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01386632&lc=en&cc=no You should obviously install the Intel tools before performing the migration.
 
Solution