Here is my current situation:
Mac Pro Server with 1x normal OS drive and 2x 750Gb data drives in a raid-1 configuration. I'm starting to fill up the space on the data drives and would like to replace the array with a set of 2Tb drives. There are only three SATA ports in my system and they are all in use with the three drives.
I'm hoping that I can replace one of the 750Gb drives with a 2Tb in the raid-1 array. Wait for the array to repair and then replace the other 750Gb drive. Then expand the 750Gb array to a 2Tb array.
Has anyone tried something like this on Mac OS X?