I have a dedicated TACACS appliance server (linux based) which I have to do a major version upgrade on. Unfortunately, there is no way for me to reverse the change if it fails, so I want to create "cloned" images of these disks so I don't really have to touch them. I have identical model disks of this appliance and I want to clone the 2 x 250GB SATA disks to this new set, and upgrade those, so that if my upgrade fails, I can re-clone again.
What utility (windows or linux) have you guys tried that can do track by track (or sector by sector) copy of disks and will play well with USB to SATA cables? Ideally, I would like to avoid opening up some chassis of some PC and connect SATA disks there, just to do a clone. I have these $40 USB to SATA gizmos that I use when I have to read the stack of SATA disks on my shelf.
Thanks and regards.