[[6.9.x] Pool device replacement doesn't work]

Hi, so I went ahead and started the array without the bad disk that is in the pool and while the array started, all the drives in the pool are labeled as Unmountable:  Too many missing/misplaced devices.

 

I've also tried scrubbing the pool, and while many errors were fixed, some were uncorrectable.  The pool is formatted as RAID6, so I'm wondering why a single drive failure can lead to this.

 

Any thoughts on what I should do next to try and recover?

 

Thanks!

[[6.9.x] Pool device replacement doesn't work]

On 6/18/2021 at 6:23 PM, John_M said:

Do we know if this is a btrfs bug or a GUI bug?

 

On 10/11/2021 at 4:54 AM, Hammer8 said:

Hi, trying to follow the discussion...this looks like the suggested workaround to replace a bad drive:

 

stop array, remove 1 device in the pool

-start array, let BTRFS work

-stop array, add replacement device

-start array, let btrfs work

 

I can do the above via the GUI.  But the thread seems to suggest this is an Unraid GUI bug.  Is there a way I can replace the bad disk with a good disk in "one" step using CLI?

 

Thanks! 

Hi, when I try to do these steps:

 

stop array, remove 1 device in the pool

-start array, let BTRFS work

-stop array, add replacement device

-start array, let btrfs work

 

I stopped the array and deselected the faulty drive from the pool using the drop down box, when I go to start the array, it says "Start will remove the missing cache disk and then bring the array on-line."

 

Should I check the box to okay the removal of the missing cache disk to start the array?  I can't tell if the message means removing the faulty disk I just deselected (which I want to do) or removing the entire pool (which I don't want to do).

 

Thanks!

 

 

[[6.9.x] Pool device replacement doesn't work]

Thank you very much.  I will give it a try and report back.  Really appreciate your help!  I must say I am very grateful to the members of this forum who are so helpful in making a complex product like UnRAID much more manageable for newbies like myself. 

[[6.9.x] Pool device replacement doesn't work]

Hi, trying to follow the discussion...this looks like the suggested workaround to replace a bad drive:

 

stop array, remove 1 device in the pool

-start array, let BTRFS work

-stop array, add replacement device

-start array, let btrfs work

 

I can do the above via the GUI.  But the thread seems to suggest this is an Unraid GUI bug.  Is there a way I can replace the bad disk with a good disk in "one" step using CLI?

 

Thanks!