I have a couple of questions regarding upgrading of images on an ASA. I have read where you can set up to 4 images, but I can't see anywhere where they give you an example of the syntax. I know for a single image, the syntax would be something like "boot system disk0:/asa724-30-k8.bin" to boot a single image. So my first question is, let's say I wanted a backup image of 724-20-k8.bin code in case my primary 724-k8-bin failed, would the syntax be the same with simply a "/" in between them, or "boot system disk0:/asa724-30-k8-bin/asa724-20-k8.bin" or is that syntax wrong?
2nd question, I know you don't have to define a boot image and that the ASA will grab the first image it finds in flash and boot from it. So if I don't have a particular boot image set, yet I have multiple images in my flash, what method does the ASA use to determine which one it "finds first"?
lastly, when I manually set the image file to boot from with the boot system command, what happens if that image is corrupt, and I happen to have other images in flash? Will the ASA do what it does when there is no boot statement and just grab the next one it finds, or will it only try what is defined in the boot system statement?