My book thunderbolt duo 2x1tb wd caviar green

WD External Drives External Drives for Mac
1

Hi
I decided to speed up my iMac a bit and decided to mount the Samsung Evo 860 SSD 1tb. After mounting the disk clearly accelerated. Before the service I had cataline installed - I made a backup to an external disk. I have a WD backup station for my thunderbolt homebook. Until now everything was playing, but after changing the disk and uploading again, iMac stopped detecting the station. I have made the disk format in many ways. The problem is that for ox to see the disks, I had to mount them both in the drive and format them so that they are in the Raid0 configuration. Before upgrading the disk, I could easily configure the Raid0 or Raid1 configuration that I care about the most. Do you have any idea how to handle it?