Asus Z87-A Motherboard
Intel Core i5-4570S Haswell CPU
Intel 530-Series 240GB SSDs (2)
All the installs done off a thumb drive.
Goal was to install Mint 17 MATE using mdadm (native Linux) RAID. /boot in its own 512MB partition/RAID1 (mirrored) set; /, swap, /var and everything else in separate RAID1 set, inside the 2nd partition.
1st experiment was to install "over the top of" an existing Mint 16 MATE installation, preserving /usr/local and /home. That was a success.
2nd experiment was to wipe everything and start from scratch, trying to make the two partitions to contain the RAID1 sets gpt partition tables. That failed, just as it had with Mint 16. Don't know why. Never get the grub prompt or anything. Maybe I missed something? Maybe I'll try again. (This is a new system. I plan to wipe it and start from scratch when the Mint 17 stable releases are published, anyway.) I suspect
the reason this experiment failed was I did not boot Live from the UEFI boot?
3rd experiment was to wipe everything and start from scratch, again, with the two partitions to contain the RAID1 sets to be msdos partition tables. That had been a stable configuration with Mint 16. That worked with Mint 17, as well.
Both experiments #1 and #3 survived the subsequent upgrade/reboot process, so I'm calling it a stable configuration.
Looks good, Mint dev team