May 16, 20224 yr 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
May 16, 20224 yr 4 minutes ago, Abstract7227 said: Any advice? Please attach your diagnostics to your next post.
May 16, 20224 yr Author 1 hour ago, ChatNoir said: Please attach your diagnostics to your next post. my apologies See attached file pandora-diagnostics-20220516-1232.zip
May 16, 20224 yr Author 1 hour ago, JorgeB said: Diags after array start please. See attached file pandora-diagnostics-20220516-1428.zip
May 16, 20224 yr Community Expert 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
May 16, 20224 yr Author 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?
May 16, 20224 yr Community Expert 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
May 16, 20224 yr Author 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
May 16, 20224 yr Author 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?
May 16, 20224 yr Community Expert 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.
May 16, 20224 yr Author 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
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