Can't install WD40EFRX in my Duo v2

What firmware are you running on the duo?

XRAID2 will use the second drive to create RAID-1 protection for the first. Because the sizes are mismatched, only 1 TB of the new drive would be used for that. The other 3 TB is unavailable.

So if I understand your steps correctly, you first made the volume redundant (raid-1). Then when you removed the 1 TB drive you ended with a degraded array.

To solve your problem you need to copy off your current data, and do a factory reset with both drives in place. There's a 5-10 minute window after you start the reset - during that window you need to set up the NAS with the RAIDar utility from a PC. You'll want to select Flexraid, then create two separate volumes - one for each drive (jbod). Then you create the shares you want on those volumes, and restore your data.

Hi elworks,

You may want to check the Netgear RAID Calculator and this might be helpful to you. Here is the link below:

http://rdconfigurator.netgear.com/raid/index.html

Is there data on the 1 tb drive?
Do you have a backup of it?

vandermerwe wrote:
Is there data on the 1 tb drive? Do you have a backup of it?

If he removed the 1 TB drive after raid sync, he should still be able to get the data from the NAS now, even though the 4 TB drive is installed.

Indeed, but there is a lot of drive manoeuvring happening, I am concerned that OP may do something with the 1 tb drive that would preclude data access.

vandermerwe wrote:
Indeed, but there is a lot of drive manoeuvring happening, I am concerned that OP may do something with the 1 tb drive that would preclude data access.

Right. If he can't read the data from the current drive, his best option is to power down, insert only the 1TB drive in its original slot, and then power up.

Though given all the drive shuffling, if his data is gone it might be too late for that.

Thank you all for the help:
Stephen, I am in the process of doing as you suggested, the only problem I have had is that I did not see where to create two separate volumes. I have reset to factory default and done a firm ware update. As I was writing this all process finished and things looked great, I now have almost 5 TB of data space. The Duo is used to make a backup of the backup drive that I have on my main computer, and to give me access to the data when I am away on the road so redundancy is not a requirement.
IXA thanks for the link it may be useful in the future and was fun to play with.
Again thank you all for the help, and I should have posted that the dive data was all removed before I started this quest.

Is the 5 tb in 2 volumes of 1 tb and 4 tb now?

If you have only 1 volume with 5 TB, then if either disk fails you will lose all your data. With two volumes, a disk failure only loses the volume on that particular disk. So I personally don't recommend the single-volume RAID-0 mode for most users.

If the data is all copied from your desktop system, you could choose to keep it as is, and re-do it when you have the next disk failure.

If you'd rather fix it now, I'd suggest another reset with only the 4 TB drive in place, and again select flexraid. Then there is certainly a way to hot-insert the 1 TB drive as a separate volume.

Yes I have 2 volumes a 1 and 4 TB.
I think that I am happy with my current configuration. After playing with this Duo for a while (I have had it for over a year and just now bought a 4 TB drive for it) I don't think I would go this route again. It seems like it would be easier to just setup a linux box to act as the server for both web and storage, which is what I had before using an ITX board. The only reason I went with the Duo was what I thought was ease of configuration and I bough the 1 TB for a good price. My old system ran for over 7 years as both an Apache server and data back up.
One other thing I see that netgear has dropped the "ready cloud" add on so that degrades the usefulness of the Duo. Has anyone ever tried to convert the box to a true linux server? or rip out the guts and put in a Raspberry pi or nano Itx board.
And I do backup everything even the Duo, with the price of USB 4 TB drives at about $100 it is cheap insurance.
Again thanks to all for the help and especially StephenB.