Hi, thanks for the quick response.
The filesystem went read-only on its own right at the first read error. I unmounted all mounts and rebooted (just to be sure). I ran the command you suggested with --progress All output is flushed away with thousands of lines like those at the end of the log paste. Does it make sense to let it run until the end or can I assume that 2 drives are bad? Also I checked SMART values but they seem to be ok. https://0x0.st/zNg6.log -- Daniel Am Mo., 15. Apr. 2019 um 13:58 Uhr schrieb Qu Wenruo <quwenruo.bt...@gmx.com>: > > > > On 2019/4/15 下午7:44, Daniel Brunner wrote: > > Hi, > > > > after normal a reboot I noticed that many files fail to open / read > > (Input/Output error). I don't really have a backup of it (only > > snapshots which also seem to be corrupted too). > > The machine is remote, I can only ssh into it (at the moment). The > > raid consists of 8x 10TB drives. > > > > System & Metadata is RAID1 > > Data is RAID6 > > > > kernel is the most recent from arch linux repositories: > > 5.0.7-arch1-1-ARCH #1 SMP PREEMPT Mon Apr 8 10:37:08 UTC 2019 x86_64 > > GNU/Linux > > > > Disk layout & usage: > > https://0x0.st/zNBl.log > > > > Output of btrfs check: > > https://0x0.st/zNJs.log > > Strange, btrfs check reports no error at all. > > Would you please try btrfs check unmounted just in case. > > > > > Kernel messages: > > http://cwillu.com:8080/84.115.44.105/2 > > According to the dmesg, it looks like one device is bad, affecting both > data and metadata. > > And thanks to recent RAID6 enhancement to try all possible mirror > combination, it doesn't cause too many problem to metadata at least. > > Although data csum is not that good. > Quite a lot of combination doesn't match checksum, and even more, some > check doesn't exist in csum tree. > > An unmounted btrfs check is recommended. > # btrfs check --check-data-csum --readonly > > This would be better than scrub. > > And please check the SMART info, some devices look suspicious. > > Also, please remount the fs read only at least to prevent further > corruption. > > Thanks, > Qu > > > > > btrfs scrub is running but it seems like it will take weeks to finish... > > > > Do you think my data is gone or is there anything I can try? An rsync > > is already running, but every 5th file fails to read. > > > > Best regards, > > Daniel > > >
