Macrium Reflect Free Edition (64 bit) Version 5, Build 4354 clearly has the following short-coming: when it comes to doing a restore, the Linux Restore program that Reflect Free Edition creates will only allow you to search for a backup image on drives that are connected to your computer AT THE TIME THAT LINUX RESTORE BOOTS UP!
Thus, if your backup image or images are on DVDs and you only have ONE CD-Rom drive, then Reflect Free Edition will not SEE anything you put in the CD-Rom drive AFTER you have booted with Linux Restore.
This means that your image files must be sitting on a drive OTHER THAN the CD-Rom drive, IF you are booting Linux Restore from the CD-Rom drive.
I have solved my problem by plugging my portable USB hard drive into my computer and then copying my set of backup images of my customised c: drive from my three DVDs onto the portable hard drive. (My backup was so big Reflect had stretched it across 3 DVDs, in three different *.mrimg files, 00, 01, and 02, so I copied all three of these files from the 3 DVDs onto the portable hard drive.)
Then, with the portable USB hard drive plugged into the computer I rebooted from the Linux Restore CD. The Linux Restore screen appeared, and, thankfully, it had observed and listed my portable hard drive. I then clicked on the portable hard drive in the Linux Restore screen and there, listed, were the three separate parts of the one backup image of my customised c: drive. I then clicked on the image file ending "00" (the first of the three) and a few clicks later my c: drive was being restored!
I have also learnt that Reflect Free Edition will not allow one to place the Linux Restore program on the same DVD as one of its image files. It insists on placing it on a clean disc. It also insists on placing Linux Restore on CD or DVD. That is, it will not allow you to place it on a portable hard drive.
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So, I hope many other people will be saved all the hours of misery I have been through by learning that:
1. Your Linux Restore boot program can only be installed on a CD and must be booted from that CD, in your CD-Rom drive.
2. When you want to restore your backup images they must be on a drive separate from your CD-Rom drive.
3. Whatever other drive your backup images are on, that drive must be plugged in to your computer BEFORE you boot up using the Linux Restore CD. Linux Restore will only search for media that are plugged in and available for view WHILE Linux is loading itself.
Most people only have one CD-Rom drive, but if you have two, then place the first disc of your backup set in your second CD-Rom drive, before booting up with Linux Restore in your main CD-Rom drive.