Problem replacing bad disk in btrfs pool

[Hammer8]

Hi, one of the disks in my btrfs pool (Raid 6) is failing and I tried to replace it following the instructions in the UnRAID manual.  1) stop array, 2) unselect the bad disk and select the new disk in place of the bad disk and 3) start the array.

 

When I do this, the pool does not mount and I get the message:  Unmountable:  Too many missing/misplaced drives.

 

However, when I reinstall the “bad” drive, the pool mounts correctly.  Does anyone know how I can replace the bad drive in this situation?

 

Thank you!

Edited October 11, 2021 by Hammer8

[JorgeB]

There's a bug:

 

You'd need to do it manually.

[Cosine]

What does "manually" mean?

[JorgeB]

8 minutes ago, Cosine said:

What does "manually" mean?

Using the CLI instead of the GUI.

[Cosine]

Hmmm, I can't seem to find the steps to do this using the CLI, do you have a link?

[JorgeB]

13 minutes ago, Cosine said:

do you have a link?

See here:

https://forums.unraid.net/topic/115767-solved-unraid-v692-upgrading-cache-pool-drive/?do=findComment&comment=1052576

 

[Cosine]

Awesome!

 

Additionally, do you know if this bug is fixed in 6.10.0-rc2?

 

Lastly, I'm replacing a cache pool of 2 SATA SSDs with 2 NVMe SSDs, would it be simplest to just create a second cache pool of the NVMe drives and change the shares to point from the old pool to the new one?

[JorgeB]

3 minutes ago, Cosine said:

do you know if this bug is fixed in 6.10.0-rc2?

It's not fixed.

 

4 minutes ago, Cosine said:

would it be simplest to just create a second cache pool of the NVMe drives and change the shares to point from the old pool to the new one?

Yes, if there's no data there or it can easily be moved.

[Cosine]

Thanks very much!