[Help] Update to 7 fails at 'Unzipping' stage! [SOLVED]

[DarthLuca]

I have a new F2-425 with a new 6GB Barracuda disk. Running (or trying to...see also current problem email) TOS 6. As this is not working (100% load all the time, 0x8007003b errors in windows file transfers), I thought I would update to TOS 7 (It can't be any worse - can it!?).
Anyway, the TOS 7 update fails at the "Unzipping the software package - Please wait!" stage. After about 15mins+ shows "Failed to update".
Is there a way to unzip manually and bypass this stage?
Tomorrow I will likely be returning the F2-425 box as "faulty - doesn't work", which I don't really want to do, so any help appreciated.
*********
Ok, an Update. After about 3/4 hour, I returned to the system to try and copy 1 file so I could watch a film through Plex.
Somehow the system updated to TOS 7 in the background. No progress report, no nothing, but now suddenly it is running 7.0. Ok fair enough, magic is magic! However after copying the one file (which sort of worked - Sat at 100% for a couple of mins, but otherwise quick). The system is was showing 100% load again! This has just dropped off. Not sure WHAT is going on with this system?? The only odd? thing I can see is that the setup shows TRAID even though I only have the one disk. Is this normal, could it cause the massive slow downs?
As I say, any help appreciated...
*****
PS. Only other thing I noticed under TOS7 is that the drive I have installed is in bay2, could that cause issues??

[CursaYang]

What is your Barracuda model? Some SMR hard drives are incompatible. This has nothing to do with the order of the slots where the hard drives are located. A single hard drive configured as TRAID is equivalent to single mode, which is normal.

[DarthLuca]

The drive is a ST6000DM003. Which would appear to use SMR technology. And I'm guessing is NOT compatible. It does not seem to appear on the list of compatible drives and I guess would explain the issues I have been having.