I currently have 2x 4TB disks, 4TB total storage. What is the best way to increase storage? I don’t really want to use more than 2 disks in total.
Can I just replace one of the 4TB disks with an 8TB drive, let it rebuild and then replace the remaining 4TB with an 8TB?
Sure can. The manual explains how. You could also add another pair of disks mirrored, but that wouldn’t be the best option if you don’t want more than 2 disks.
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I did this….except with 6 TB drives replacing the 4 TB ones. And it didn’t seem to increase the Pool capacity
I offlined one disk, physically replaced it with a 6 TB, then did a replace in the GUI. After it resilvered (it didn’t take long because this is a test pool with only 200GB or so of data in it), I repeated the process for the other disk. Ofline, physically remove, insert new 6TB disk, do a replace, wait for resilver to complete.
The gui indicates I have a mirror made of 2 6TB drives, but the capacity remains at 4TB,
System: FREENASS Mini 3.0 XL+ running 25.10.3.1
The systems used to do auto expansion but now you have to do it manually. EXPAND button. I don’t remember what version of TrueNAS I took the screenshot but it should be close. Refer to the online documentation, otherwise.
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Oh…that’s what that expand button is for!
Many thanks!!