QNap Config - Adding a drive.

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So a friend has a 2 drive qnap nas connected to his predominantly Apple network. It had 2*6TB seagate ironwolf drives in a mirrored config. One drive died. So he bought 2 8tb drives with the plan to transfer his data to those instead. So to start he removed the faulty 6tb drive as it was squealing like a stuck pig so annoying to say the least.

 

Then, putting one of the two 8tb drives in a USB caddy he copied all the data he wanted to keep on one of those and removed the 6tb drive from the nas, swapping it with a fresh 8tb. He configured it as a thin single drive and copied his data back to it. His plan was to then add the second 8tb drive and make it a mirror. This is where he became stuck and called me.

 

I work in the enterprise area and on our kit we can mirror existing drives to a new drive this way. I am not familiar with qnap, never having used it. I am more familiar with EMC, Eternus etc. But I am not sure how or even if it can be done this way. So any thought appreciated.

 

I can copy his data from his single 8tb drive off device, reconfigure his 2 drives as a raid 1 then copy back his data, but that is obviously going to take me more than one trip to his house, something I would like to avoid.