Hi,

 

I have a btrfs raid1 pool of 2x1Tb ssd that i wish to replace with 2x4tb ssd.

my unraid server version is 7.0.1.

btrfs filesystem usage:
Overall:
    Device size:		   1.75TiB
    Device allocated:		   1.36TiB
    Device unallocated:		 398.38GiB
    Device missing:		     0.00B
    Device slack:		     0.00B
    Used:			   1.31TiB
    Free (estimated):		 222.02GiB	(min: 222.02GiB)
    Free (statfs, df):		 222.02GiB
    Data ratio:			      2.00
    Metadata ratio:		      2.00
    Global reserve:		 512.00MiB	(used: 0.00B)
    Multiple profiles:		        no

                  Data      Metadata System                               
Id Path           RAID1     RAID1    RAID1     Unallocated Total     Slack
-- -------------- --------- -------- --------- ----------- --------- -----
 1 /dev/nvme1n1p1 692.00GiB  3.00GiB  64.00MiB   199.19GiB 894.25GiB     -
 2 /dev/nvme2n1p1 692.00GiB  3.00GiB  64.00MiB   199.19GiB 894.25GiB     -
-- -------------- --------- -------- --------- ----------- --------- -----
   Total          692.00GiB  3.00GiB  64.00MiB   398.38GiB   1.75TiB 0.00B
   Used           669.17GiB  2.02GiB 128.00KiB

I read about trouble with btrfs in unraid 7.0.x

Am i right to assume that the documented procedure should work?

 

Stop the array.
(optional) Physically detach the disk from your system you wish to remove.
Attach the replacement disk (must be equal to or larger than the disk being replaced).
Refresh the Unraid WebGUI when under the Main tab.
Select the pool slot that previously was set to the old disk and assign the new disk to the slot.
Start the array.
If presented with an option to Format the device, click the checkbox and button to do so.

 

Yes, and you don't need to physically detach the old device, first do the two replacements, one at a time, then you can add the other 2 devices.

thanks.

Unfortunately i need to do it several steps as i don't have spare nvme ports.

In fact i do need more tweaking as my layout is :

nvme0: ssd 2 tb ingest pool (pcie4 x4)

nvme1: ssd 1tb cache pool1 (pcie3 x4)

nvme2: ssd 1tb cache pool2 (pcie3 x2)

i will also move ingest pool ssd to pcie3 x2 and finally have cache pool ssds in pcie4 x4 and pcie3 x4 to have more iops. My ingest pool will be slower but i prefer my cache pool to be quicker as it holds my 65 running containers, 4 vms including a very hungry security onion vm

The reason is my actual 1tb ssd are 22110 models which do not fit in pcie4 x4 slot. Replacements ssds are 2280 models.

 

You should not need that, but note that there's a bug with 7.0.x affecting btrfs pool device removals only, not replacements, just FYI, and that was fixed in 7.1.0-beta.1

upgrade is done.

All went well.😀