On 2020/1/5 下午10:17, Christian Wimmer wrote: > Hi Qu, > > >> On 5. Jan 2020, at 01:25, Qu Wenruo <quwenruo.btrfs@xxxxxxx> wrote: >> >> >> >> On 2020/1/5 上午1:07, Christian Wimmer wrote: >>> Hi guys, >>> >>> I run again in a problem with my btrfs files system. >>> I start wondering if this filesystem type is right for my needs. >>> Could you please help me in recovering my 12TB partition? >>> >>> What happened? >>> -> This time I was just rebooting normally my virtual machine. I discovered during the past days that the system hangs for some seconds so I thought it would be a good idea to reboot my SUSE Linux after 14 days of working. The machine powered off normally but when starting it run into messages like the pasted ones. >>> >>> I immediately powered off again and started my Arch Linux where I have btrfs-progs version 5.4 installed. >>> I tried one of the commands that you gave me in the past (restore) and I got following messages: >>> >>> >>> btrfs-progs-5.4]# ./btrfs restore -l /dev/sdb1 >>> checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 >>> checksum verify failed on 3181912915968 found 00000071 wanted 00000066 >>> checksum verify failed on 3181912915968 found 000000A9 wanted 00000064 >>> bad tree block 3181912915968, bytenr mismatch, want=3181912915968, have=4908658797358025935 >> >> All these tree blocks are garbage. This doesn't look good at all. >> >> The weird found csum pattern make no sense at all. >> >> Are you using fstrim or discard mount option? If so, there could be some >> old bug causing the problem. > > > Seems that I am using fstrim (I did not know this, what is it?): > > BTW, sda2 is here my root partition which is practically the same configuration (just smaller) than the 12TB hard disc > > 2020-01-03T11:30:47.479028-03:00 linux-ze6w kernel: [1297857.324177] sda2: rw=2051, want=532656128, limit=419430400 > 2020-01-03T11:30:47.479538-03:00 linux-ze6w kernel: [1297857.324658] BTRFS warning (device sda2): failed to trim 1 device(s), last error -5 > 2020-01-03T11:30:48.376543-03:00 linux-ze6w fstrim[27910]: fstrim: /opt: FITRIM ioctl failed: Input/output error That's the cause. The older kernel had a bug where btrfs can trim unrelated data, causing data loss. And I'm afraid that bug trimmed some of your tree blocks, screwing up the whole fs. > 2020-01-03T11:30:48.378998-03:00 linux-ze6w kernel: [1297858.223675] attempt to access beyond end of device > 2020-01-03T11:30:48.379012-03:00 linux-ze6w kernel: [1297858.223677] sda2: rw=3, want=421570540, limit=419430400 > 2020-01-03T11:30:48.379013-03:00 linux-ze6w kernel: [1297858.223678] attempt to access beyond end of device > 2020-01-03T11:30:48.379013-03:00 linux-ze6w kernel: [1297858.223678] sda2: rw=3, want=429959147, limit=419430400 > 2020-01-03T11:30:48.379014-03:00 linux-ze6w kernel: [1297858.223679] attempt to access beyond end of device > 2020-01-03T11:30:48.379014-03:00 linux-ze6w kernel: [1297858.223679] sda2: rw=3, want=438347754, limit=419430400 > 2020-01-03T11:30:48.379014-03:00 linux-ze6w kernel: [1297858.223680] attempt to access beyond end of device > > Could this be the problem? > > > Suse Kernel version is 4.12.14-lp151.28.13-default #1 SMP I can't find any source tag matching your version. So I can't be 100% sure about the bug, but that error message still shows the same symptom. I recommend to check updates about your distro. Thanks, Qu
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