I just completed a verified Reflect backup of my Win7/Pro x64 system disk (OS & Program files.) It worked fine. The Toshiba 2TB drive that Fry's sold me last month started making noises like a car alarm (horn beeping) about a block away. Loud enough to hear and get my attention. That was the disk on which I could not run chkdsk at an advanced prompt with the /r flag set.
I would have loved to wipe the old disk clean, but I gave up and 'simply deleted' the one Belarc profile I'd saved there and took at back. I let Fry's know that it was 'honking' and should not be put back on the shelf... I came home with a new 2TB Seagate (PN/ 9JB1N3-576 - ST2000DM001-1ER164ATA) and, with some encouragement from ignatzatsonic on sevenforums I initialized it as another MBR disk and ran a backup which verified.
There are complaints in Amazon 'reviews' about internal drives overheating in this eSATA drive bay. A month ago I had some concerns about heat dissipation in the BlackX Duet and made a 'fan-stand' out of bits-and-pieces in the garage to blow some air on it. The fan is a spare 80 mm 26 cfm Mechatronics (F8025S12bfs) with a switch that allows me to control external access to 12V DC from my power supply when I want it. I was pleased to see that the temperature only rose from 30°C to 32°C over the 30 minutes the backup and verification took. Data courtesy of Crystaldiskinfo. There is about 1.5" space between the fan and the top of the drive. Here's a photo:
Now I need to start thinking about a similar backup for the Windows 10 installation so that I can begin installing software and seeing how the new OS works for me. I have a busy 2 weeks ahead of me, but I'll see what I can do.
I thought I should document the apparent reason why my original attempts to use Macrium Reflect backup during the marathon upgrade process failed.