Hello grad_ee, on this case the problem could be related with the SATA controller and how it is recognizing the Solid State Drive, I would like to know if you are using the latest Intel(R) data migration software version, also take into consideration that there are other third party cloning software tools that can perform the same task in case that the data migration cannot clone your Solid State Drive.
If you still need assistance you can contact us via phone at the following number: 916 377 7000 option 7.
IMO, your problems were caused by the size of the source drive/partition being larger than the destination drive. In that case, the source drive and partitions must be manually selected, and that procedure is not obvious and easy to do incorrectly.
I recently did multiple OS cloning operations to Intel SSDs on two PCs, with the latest version of IDMS, and they all worked fine, with one restriction. I was not able to clone an OS to a RAID 0 volume of SSDs. Both PCs were in RAID mode when I started, and one of them had the OS installed on a RAID 0 volume. In my experience it is not simply using RAID mode that is a problem, it was just a limitation that the target drive can not be a RAID volume.
I also did not have problems with any formatting of the destination SSD, since it will be formatted by the IDMS software to match the format type of the source/OS drive.