replacement drive rebuild finished with no data on the drive

[MrLondon]

Hi there,

 

I replaced a 2 TB drive yesterday with a 4 TB drive, I powered down the server replaced the drive and once the server was up I chose the new drive in the old drives position and started the rebuild then I saw a message that it was unmountable and it gave me an option to format the drive which I did, I aborted the existing parity resync and started it again. It now finished but there is no data on the drive and it shows a utilization of 4 gb. Luckily I still have the original drive as it did not fail, but what did I do wrong here? I have attached my diagnostic file

tower-diagnostics-20180129-0742.zip

[JorgeB]

1 hour ago, MrLondon said:

but what did I do wrong here?

 

1 hour ago, MrLondon said:

it gave me an option to format the drive which I did

 

Formatting is never part of a rebuild, it deletes all data on the disk and it updates parity.

[MrLondon]

So how will I get the 2 tb of data back to the replacement drive?

[JorgeB]

You can mount the old disk with the UD plugin and copy the data to the new disk.