Cache drive failed, shown as unnassigned instead of missing?

[Abstract7227]

Hi,

 

My current setup has 4 cache drives set to btrfs raid1.

One of those 4 drives seems to have died and I wanted to make sure that I am doing things by the book to prevent any data loss.

 

When I boot the server, it shows the failed drive as unassigned (which is a little weird to me, cause with array drives, they usually show as missing + drive name).

 

When I start the array without the failed drive attached, my docker containers seem to be missing. Shouldn't those still show up as the cache pool is set as a raid1 and therefor no data should've been lost?

 

When a spare drive is connected, I have the option to add it to the cache pool and format it, but I want be sure that if I do that, it will just rebuild the raid and give me back my docker containers?

 

Any advice?

Thx in advance

[ChatNoir]

4 minutes ago, Abstract7227 said:

Any advice?

 

Please attach your diagnostics to your next post.

[Abstract7227]

1 hour ago, ChatNoir said:

 

Please attach your diagnostics to your next post.

 

my apologies

See attached file

pandora-diagnostics-20220516-1232.zip

[JorgeB]

Diags after array start please.

[Abstract7227]

1 hour ago, JorgeB said:

Diags after array start please.

 

See attached file

pandora-diagnostics-20220516-1428.zip

[JorgeB]

Error suggests superblock is damaged in one ore more devices, try the safe recovery options described here first:

 

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=543490

 

[Abstract7227]

19 minutes ago, JorgeB said:

Error suggests superblock is damaged in one ore more devices, try the safe recovery options described here first:

 

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=543490

 

 

Thx for the response.

I am getting the following error on all of my remaining cache drives:

 

> ERROR: cannot read chunk root
> Could not open root, trying backup super

 

Wanted to check if the only thing I can do is go for the btrfs check --repair command, as you state it is not a preferable solution?

[JorgeB]

If even the backup supers don't work unlikely that check --repair will also work, before trying that try this, on all 3 devices:

 

btrfs-select-super -s 1 /dev/sdX1

 

[Abstract7227]

1 minute ago, JorgeB said:

If even the backup supers don't work unlikely that check --repair will also work, before trying that try this, on all 3 devices:

 

btrfs-select-super -s 1 /dev/sdX1

 

 

no luck:

 

ERROR: cannot read chunk root
Open ctree failed

 

Will try --repair now

 

btrfs check --repair /dev/sdX1

 

[Abstract7227]

yeah, like you said, it didn't work either

 

ERROR: cannot read chunk root
ERROR: cannot open file system

 

So I have to live with the fact that all of my cache data is gone?

[JorgeB]

You can try this mentioned in the link:

 

If all else fails ask for help on the btrfs mailing list or #btrfs on libera.chat

 

Other than that can't help more with that error, since apparently all superblocks are damaged.

[Abstract7227]

Just now, JorgeB said:

You can try this mentioned in the link:

 

If all else fails ask for help on the btrfs mailing list or #btrfs on libera.chat

 

Other than that can't help more with that error, since apparently all superblocks are damaged.

 

Aight, thx for the help