I’ve been running Napp-IT for a couple of years for my photo’s and other important stuff. My drives are a couple of years old so it was really time to upgrade from a 2 TB 3-way mirror to a 4 TB 2-way mirror.
These are the steps I took to accomplish this.First remove the third drive from the mirror:
zpool detach poolname <drivename>
After that Napp-IT will issue the replace command and the system will start a resilver process to get the drives back in sync.
You can watch the process by issuing:
zpool status poolname -v
Wait for the resilver process to finish before adding the second 4 TB drive.
zpool online -e poolname <drivename>
Do that for each drive then issue the following command to see the increased capacity:
zpool list poolname
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