Posted May 24, 20232 yr Hi all I'm in version 6.12.0-rc6 and plugins etc are updated. I've just noticed that my 3 cache drives which are formatted btrfs are unmountable and unRAID is telling me to format, but I have stuff on them. Is this because with all the recent updates I need to select something so the btrfs drives are recognised? I don't really know what to do next coz all was working fine a couple days ago and it's only changed due to the updates. Any help will be much appreciated.
May 25, 20232 yr Community Expert Solution Try this, if the log tree is the only problem it may help: btrfs rescue zero-log /dev/nvme1n1p1
May 26, 20232 yr Author 17 hours ago, JorgeB said: Try this, if the log tree is the only problem it may help: btrfs rescue zero-log /dev/nvme1n1p1 This fixed it! Thanks for your help! If you get a spare moment, would you be able to explain how you found the problem? Should I change the btrfs file system to something else?
May 26, 20232 yr Community Expert The log shows that the log tree failed be read. 6 hours ago, HomerJ said: Should I change the btrfs file system to something else? Usually something else causes this issue, not directly btrfs related, but you can try a different fs if you prefer, also note that this issue tends to re-occur, if it does would recommend re-formatting the fs.
May 27, 20232 yr Author 16 hours ago, JorgeB said: The log shows that the log tree failed be read. Usually something else causes this issue, not directly btrfs related, but you can try a different fs if you prefer, also note that this issue tends to re-occur, if it does would recommend re-formatting the fs. Thank you so much for your help! If I change file systems, which do you think I should choose? NB it's cache.
May 28, 20232 yr Author On 5/27/2023 at 6:02 PM, JorgeB said: I assume current pool is raid1 with the 3 devices? Yes
May 28, 20232 yr Community Expert For multi device pools you can use btrfs or zfs, so you could change to zfs, but note that there's no 3 device raid1 option with zfs, you can have 2 or 4 devices in raid1, with 3 devices you can only make a 3-way mirror.
December 8, 20231 yr Author On 5/25/2023 at 6:02 PM, JorgeB said: Try this, if the log tree is the only problem it may help: btrfs rescue zero-log /dev/nvme1n1p1 G'day again! I've had this issue occur a few times since it first happened, and this solution has fixed it each time. But what would actually cause this to happen?
December 8, 20231 yr Community Expert If it keeps happening I would recommend to backup and reformat the pool.
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