unmountable cache pool

[patmanRR]

Hi, I was using 2 disks as a BTRFS RAID-1 cache pool and I wanted to replace one of them with a newer one but i do not know what is happening. as unraid's GUI is completeley incomprehensible to me, I tried to check the btrfs status from the command line but i am not sure what is happening. Can someone help me debug it / fix it please?

 

Right now, the array is stopped and the original disks plugged in the computer, yet the first disk is marked as a new disk that has to be formatted and there is a message saying

all existing data on this device will be OVERWRITTEN when array is started

while the second one is marked as "Wrong". On the command line I get this message:

root@unjim:/# btrfs fi show
warning, device 1 is missing
WARNING: could not setup csum tree, skipping it
checksum verify failed on 1298048253952 wanted 0x00000000 found 0xb6bde3e4
ERROR: failed to read block groups: Input/output error
Label: none  uuid: 0f448acc-492a-4d68-ad12-49b8fd3d8cb6
	Total devices 1 FS bytes used 1.36TiB
	devid    1 size 3.64TiB used 1.71TiB path /dev/sde1

Label: none  uuid: c606474f-b510-46c4-ab56-709e9c18a99b
	Total devices 2 FS bytes used 82.04GiB
	devid    2 size 931.51GiB used 86.03GiB path /dev/sdd1
	*** Some devices missing

Label: 'WD-2Tbgreen'  uuid: 1b0538d8-9837-4103-ad62-ea1550192c39
	Total devices 1 FS bytes used 653.09GiB
	devid    1 size 1.82TiB used 668.02GiB path /dev/sdc1

root@unjim:/# mount -o degraded /dev/sdd1 /abc
mount: /abc: wrong fs type, bad option, bad superblock on /dev/sdd1, missing codepage or helper program, or other error.

I hope there is a way to fix/turn one of the previously used disks to a single disk BTRFS cache pool and then add the new disk to make it a two disk RAID-1 btrfs cache pool without losing my data but i could use some help/insight

 

Thank you in advance.

[JorgeB]

Sorry for the late reply, missed this post before, please post the diagnostics.