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#11
Thank you topgundcp@Stephanie
You should not have to create the rescue disk on CD/USB. You can set it up to boot from the external HD that you are making backup image with so you don't have to carry the CD/USB around. It is faster to boot and take no time to create a new version, just delete the old version, create new ISO and unzip. Here's a video on how to. Note that the same procedure is used for internal HD/SSD.
NOTE: You could also create a dual boot with Macrium but it will slow down the boot time. Besides, if your OS drive is broken then you'd have no way to boot.