I think it worked! I now have one new volume from 2 disks. When I mount it, I can read and write to it. A different paradigm. My first experience with...

Both disks are empty. I will try as you suggested. I assume the 250gb disk is NOT a mirror. What format should it be?

I suspect what you have done so far is convert them to SoftRAID format, but that is not a RAID volume. Try this: copy all the data onto the 250GB ...

I am new and trying to set up a 250gb and 299gb ext HDD as RAID disks. I am being told the largest mount of data I have available on the disks is 18.6...