I am not following the "make array from portal - then use disk utility and use
CCC to clone a version of OSX to the SSD while on the array" instructions.
So my understanding is that you have a Single EVO SSD with 10.8.5 already installed, correct?
First off, are you sure you're using the ROCKETRAID 642L and not the ROCKETRAID 644L, or the RocketRAID 642 (no L)? If it says "rocket" and not rocketRAID, or if it has no L things are different.
If this is the case, you can forget about the cloning process. However, before you boot onto the card, you need to some things:
1. You need to make sure the 642L EFI ROM/Firmware is installed. I know you said it "locked up" when you attempted it, I would attempt again as this is a necessary step. Attached is a copy of the ROM (the .rom file), as well as the latest WebGUI.
2. If you are using 10.8, you need to install the DRIVER into OS X on the drive. Attached is the driver (the .dmg)
The "Clone" process is only necessary to get a copy of OS X installed onto the drive, as the OS X 10.8 installer you boot into doesn't have the driver for the card. I
f you have OS X installed on the drive already, you can skip the clone process, but you still to install the driver onto the hard drive.
Of note: In 10.9, Apple has included a copy of the driver is in both the installer and the installed copy of the OS.
On "building the array" --
If you are just using JBOD, you don't have to "build" anything, just install the driver and the firmware, plug in the drive, and it should "just work". The card has the ability to setup a RAID-0 and a RAID-1.