I'm sorry, because a long time after I sent the first email, I didn't see it in the web archive. I suspected there was a problem during the sending process, so I sent a second one. I apologize for my mistake.
>Hello everyone, I use Btrfs as the file system on my laptop. Yesterday, I was >preparing to backup a snapshot to an external hard drive using btrfs send, and >the following error occurred: > >ERROR: send ioctl failed with -5: Input/Output error > >I used btrfs scrub to scan the disk, and the result was: > >Error summary: csum=1 > >Corrected: 0 > >Uncorrectable: 1 > >Unverified: 0 > >Afterwards, I booted a LiveCD and ran: > >btrfs check --init-csum-tree > >During the running process, many outputs similar to this appeared: > >root 1380 inode 5006723 errors 2001, no inode item, link count wrong >unresolved ref dir 1164151 index 1566 namelen 28 name <filename> filetype 1 >errors 4, no inode ref > >Then I found that the file in the above <filename> had disappeared. At this >point, I immediately backed up all the existing files and then used: > >btrfs check --repair > >btrfs rescue > >in an attempt to recover the lost files, but was unsuccessful. > >The current issues are: > >How do I recover the lost files? > >Why does btrfs check --init-csum-tree cause file loss? Is this a bug? > >LiveCD information: > >Linux ubuntu 6.2.0-26-generic #26~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Jul >13 16:27:29 UTC 2 x86_64 x86_64 x86_64 GNU/Linux > >Thank you for your help. >
