bauercole Posted February 13, 2020 Share Posted February 13, 2020 This evening trying to write to any share gave me the response the file system being read-only. I restarted my UnRaid machine and it came back with one of my disks saying "Unmountable: No file system". I tried to verify all cables were secure and reboot, then it came up with the disk missing. I reverified cables and rebooted, and it had a message about rebuilding the array which I confirmed without thinking too much. I'm not sure how to proceed or if I should let the rebuild continue. I also see a message on the monitor connected to the screen that says "BTRFS critical (device md2): corrupt node: root=2 block=894402560 slot=242, unaligned pointer, have 281472972331872 should be aligned to 4096". I am on UnRaid 6.8.2 Processor: Ryzen 7 1700 Motherboard: Asus Prime B350 Plus Hard Drives: 2xST10000VN0004 and 1xST10000NM0016 Plugins: Community Applications, Dynamix WireGuard, Nerd Tools, Unassigned Devices, Wake On Lan Support 3 bluray drives (2xSata, 1xUSB) Diagnostics are attached. Any advice is greatly appreciated tower-diagnostics-20200212-2133.zip Quote Link to comment
JorgeB Posted February 13, 2020 Share Posted February 13, 2020 3 hours ago, bauercole said: and it had a message about rebuilding the array which I confirmed without thinking too much. I'm not sure how to proceed or if I should let the rebuild continue. Not the best option, but nothing to be done about that now, let the rebuild finish then see here for some recovery options. Quote Link to comment
bauercole Posted February 13, 2020 Author Share Posted February 13, 2020 Thank you, I will try this when rebuild is complete. Another concern though is that it doesn't appear to be emulating the unmounted drive with parity. What would cause that to happen? Quote Link to comment
JorgeB Posted February 13, 2020 Share Posted February 13, 2020 3 minutes ago, bauercole said: What would cause that to happen? There's corruption on the filesystem of the emulated drive, that's why I mentioned it wasn't the best option to rebuild on top of the original disk, though by your description that one was likely suffering from corruption as well, but possibly not as serious. Quote Link to comment
bauercole Posted February 13, 2020 Author Share Posted February 13, 2020 The rebuild completed. I attempted to mount the filesystem in read-only as suggested as a first step in the link provided and got the following: root@Tower:/mnt/disks# mount -o usebackuproot,ro /dev/sdd1 /mnt/disks/disk2temp/ mount: /mnt/disks/disk2temp: wrong fs type, bad option, bad superblock on /dev/sdd1, missing codepage or helper program, or other error I don't have another drive on hand large enough to attempt the btrfs restore suggested as step 2. I have one on the way now, but it won't arrive until Monday Do you think there is much chance the btrfs restore will be successful? Thanks for your guidance so far, I appreciate it Quote Link to comment
JorgeB Posted February 13, 2020 Share Posted February 13, 2020 6 minutes ago, bauercole said: Do you think there is much chance the btrfs restore will be successful? It's most likely option to work for this case, though obviously not certain to work. Quote Link to comment
bauercole Posted February 18, 2020 Author Share Posted February 18, 2020 I received my replacement drive yesterday and started the btrfs restore. It's probably about 40% complete at the moment. I've had to skip a few files, but nothing too critical Quote Link to comment
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