Replacing two smaller disk with a big momma one

[tomume]

Hi all,

 

sorry if this has already been answered.

 

I have 2x4gb WD disks and I want to remove them from the array. The goal is to add another 20TB seagate disk in the array. (apparently you'd save energy cost with less disks)

I think i found a good tutorial on youtube: https://www.youtube.com/watch?v=Oa_3FApcxAs for replacing on failed disk with a new one.

Thing is, i got 2 disks to remove and add juste one (a bigger one).

I also found this video but it's much older and honestly i don't understand it all... https://www.youtube.com/watch?v=nV5snitWrBk

 

here is my setup:

 

thanks in advance and have a good day !

 

can someone enlighten where i should look to have more infos ?

 

Edited July 21 by tomume
not complete

[Rysz]

Hello!

 

The way I understood your question, ideally you would rebuild one of the 4TB disks onto the new 20TB disk:

https://docs.unraid.net/legacy/FAQ/replacing-a-data-drive/

 

Then you'd shrink the array either doing a new configuration (rebuilding parity) or the more complicated shrink array procedure (preserving parity):

https://docs.unraid.net/legacy/FAQ/shrink-array/ (shrinking the array meaning removing the obsolete 4TB drive)

 

But honestly I'd keep the obsolete 4TB drive in the array and replace it with a larger drive down the road, as that doesn't expose you to the vulnerability of having to rebuild your parity (during which your other drives would not be protected) or having to follow the complicated shrink array procedure. For me personally the little amount of energy saved would not be worth that risk or effort, I'd just keep that disk spun down and replace it with a larger disk in the future. 🙂 

 

Edited July 21 by Rysz

[tomume]

thanks a lot. It's working. OMG formatting and parity check takes forever on a 20tb drive ...