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.

To begin with, I compressed all my files. I changed the attributes as you told me and I will see how it goes, if I have to manually run some command etc. Thanks for the info.

OK but isn't there a way to automate this option? sth like adding the required command in rc.local for example? I am familiar with linux in general (also slackware) but i am missing some knowledge on unraid specifics.

Hi, I would like to check if btrfs' compression is enabled and if not enable it. I tried looking in /etc/fstab but the disks are not mounted there. I also googled about it but did not find a solution, so can some one please let me know how to do it (or if for some reason it is not supported) Thanks a priori.