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Is it possible to mirror a system live to a USB SSD?

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High level overview, I have 1000s of POS-style desktop systems with older SSDs in them performing critical tasks, 7x24x365, so downtimes and interruptions are extremely hard to get.  The SSDs are worn down and I'd like to replace them.

The current process is to build a new box with the same name and swap them out, which takes an hour of system downtime and a lot of manual steps.

What I envision and am exploring is plugging a USB SSD into the system, mirroring the drive (there is only 1) to this drive while the box is running, then send someone in to physically swap the drives.  This mirroring would need to be done while the system is active, and kept current while connected, then we come in, power it down, swap the mirrored drive in, power up and all done.  The ultimate goal is the shortest possible outage window.

Is this even an option?  I'm playing with the vendor version of Acronis, a very "lite" version, and it locks the C: down during the cloning, which isn't ideal, so I'm hunting around for other options/possibilities.

Edit: By "mirror" in this context, I expect it to be a 1-way/read-only mirror, a clone of sorts, but kept live.  I've no expectation of it acting like an actual mirrored drive and read from, if that makes sense?

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ATI 2019 would not be able to remotely clone the drive. It has to run on the system being cloned. ATI 2019 can clone a Windows system without taking it offline, however any changes made after the clone start will not be included  in the clone.

You really need to consider a more sophisticated deployment technique. You will no doubt have do this again in the future so it would be worthwhile in investing in hardware/software that make it easy to do the replacement. Given that the devices are networked there may be a way of doing what you wish. One possibility would be to set up each device so that its profile can be easily migrated to another system, or indeed the same system with a new drive. Similar to workers being able to log into any PC on the network and have all their files available; this can be done, as I understand it, with an Exchange Server or something more modern.

I suspect you really need to talk to a deployment expert.

Ian