My btrfs cache pool is unmontable.

[giuem]

Hi folks, I have a btrfs raid1 cache pool which store appdata and vm disks. Last night it became read-only filesystem and I follow some guide trying to backup files to other driver. Unfortunately, not all files backup successfully, some files show i/o error (perhaps?). Then I try to re-start array, the pool was unmontable.

 

 

Here are my diagnostic. Any chance that I can get my data back? So appreciate your help!

vault-diagnostics-20240319-1433.zip

[JorgeB]

If the log tree is the only issue this may help:

 

btrfs rescue zero-log /dev/nvme0n1p1

 

Then restart the array.

[giuem]

34 minutes ago, JorgeB said:

If the log tree is the only issue this may help:

 

btrfs rescue zero-log /dev/nvme0n1p1

 

Then restart the array.

Thank you! After running the command, my pool now goes back. But it becomes a read-only filesystem, what should I do next? I have do some research before, maybe I should backup files and reformat it🤔

[JorgeB]

13 minutes ago, giuem said:

But it becomes a read-only filesystem, what should I do next?

Post new diags, but likely the filesystem has other issues, and in that case recommend backup and re-format.

[giuem]

2 minutes ago, JorgeB said:

Post new diags, but likely the filesystem has other issues, and in that case recommend backup and re-format.

Got it, I will backup. Also I'm curious what's wrong with my pool, here's new diagnostics

vault-diagnostics-20240319-1805.zip

[JorgeB]

Yes, there are other issues, with btrfs it's better to backup and re-format.