New machine dilemma

Hello everyone,
first time posting here and hoping you can help me with an issue.
My old Mac Pro (early 2008) required a new logic board, so I instead purchased a mid-2012 model. I was under the impression that the transition would be simple, and with the old one dead, didn't have much choice but to move my 2 x RAID drives to the new machine. They are in a striped/0 configuration and because my machine has been down, there are a couple of files that are not backed up that I would like to get from them.
Unfortunately, in the new machine, the RAID has been very intermittent. Initially it did not show up, until earlier, to my surprise, I turned the computer on and it showed up on the desktop. Everything worked perfectly, all my videos played and there was very little drama. I thought everything was ok, until I restarted the system after some more updates, and now it is gone again. Each time it won't mount, I can see that one of the disks is missing. Both disks show up in SoftRAID with "disk failure predicted" and I'm just wondering what I can do to recombine them again so that the RAID shows up and I can recover the files. I know the files are still there, since data recovery software is able to see them all, but it would be very time consuming to recover all the files in that manner.
Please let me know your thoughts - as mentioned, I'm new to SoftRAID and wondering if there is a function to re-unite the two disks again. Thanks for your help.