On Thu, Mar 16, 2017 at 08:23:05PM +0800, 李云甫 wrote: > hi, buddy > > I have a file server with btrfs file system, it's work well for several months. > > but after last system reboot, the /dev/sdb become not mountable. > > below is the details. is there any advise? > > > ######Version info > Fedora 25 Server > Kernel 4.9.13-201.fc25.x86_64 > btrfs-progs v4.6.1 > > #####error messages when mount > mount: wrong fs type, bad option, bad superblock on /dev/sdb, > missing codepage or helper program, or other error > > In some cases useful info is found in syslog - try > dmesg | tail or so. > > ######dmesg |tail > [79570.756871] BTRFS error (device sdb): parent transid verify failed on 21413888 wanted 755660 found 623605 > [79570.762307] BTRFS error (device sdb): bad tree block start 0 21413888 > [79570.762345] BTRFS error (device sdb): failed to read chunk tree: -5 > [79570.778129] BTRFS error (device sdb): open_ctree failed > [79589.743772] BTRFS error (device sdb): support for check_integrity* not compiled in! > [79589.803176] BTRFS error (device sdb): open_ctree failed > Looks like one node of the chunk tree was zero'd by something, were you use -o discard or fstrim before reboot? Thanks, -liubo > ######btrfsck > parent transid verify failed on 21413888 wanted 755660 found 623605 > parent transid verify failed on 21413888 wanted 755660 found 623605 > checksum verify failed on 21413888 found E4E3BDB6 wanted 00000000 > parent transid verify failed on 21413888 wanted 755660 found 623605 > Ignoring transid failure > checksum verify failed on 21331968 found E4E3BDB6 wanted 00000000 > checksum verify failed on 21331968 found E4E3BDB6 wanted 00000000 > checksum verify failed on 21692416 found E4E3BDB6 wanted 00000000 > checksum verify failed on 21692416 found E4E3BDB6 wanted 00000000 > checksum verify failed on 22888448 found E4E3BDB6 wanted 00000000 > checksum verify failed on 22888448 found E4E3BDB6 wanted 00000000 > checksum verify failed on 22888448 found E4E3BDB6 wanted 00000000 > checksum verify failed on 22888448 found E4E3BDB6 wanted 00000000 > bytenr mismatch, want=22888448, have=0 > Couldn't read chunk tree > Couldn't open file system > > ######btrfs-find-root > parent transid verify failed on 21413888 wanted 755660 found 623605 > parent transid verify failed on 21413888 wanted 755660 found 623605 > parent transid verify failed on 21413888 wanted 755660 found 623605 > Ignoring transid failure > Couldn't read chunk tree > ERROR: open ctree failed > > ######btrfs-show-super -a /dev/sdb > superblock: bytenr=65536, device=/dev/sdb > --------------------------------------------------------- > csum 0xb6f3ccb1 [match] > bytenr 65536 > flags 0x1 > ( WRITTEN ) > magic _BHRfS_M [match] > fsid 7f5aecd6-40fe-45ce-90c3-e86bacc4bf6f > label samba_fs > generation 770740 > root 16187774615552 > sys_array_size 355 > chunk_root_generation 755799 > root_level 1 > chunk_root 24331161698304 > chunk_root_level 1 > log_root 0 > log_root_transid 0 > log_root_level 0 > total_bytes 23999996231680 > bytes_used 22205028102144 > sectorsize 4096 > nodesize 16384 > leafsize 16384 > stripesize 4096 > root_dir 6 > num_devices 1 > compat_flags 0x0 > compat_ro_flags 0x0 > incompat_flags 0x169 > ( MIXED_BACKREF | > COMPRESS_LZO | > BIG_METADATA | > EXTENDED_IREF | > SKINNY_METADATA ) > csum_type 0 > csum_size 4 > cache_generation 770740 > uuid_tree_generation 770740 > dev_item.uuid dd8c8d66-b6f5-48d8-9d5e-6f56b2ad4751 > dev_item.fsid 7f5aecd6-40fe-45ce-90c3-e86bacc4bf6f [match] > dev_item.type 0 > dev_item.total_bytes 23999996231680 > dev_item.bytes_used 23274943676416 > dev_item.io_align 4096 > dev_item.io_width 4096 > dev_item.sector_size 4096 > dev_item.devid 1 > dev_item.dev_group 0 > dev_item.seek_speed 0 > dev_item.bandwidth 0 > dev_item.generation 0 > > superblock: bytenr=67108864, device=/dev/sdb > --------------------------------------------------------- > csum 0x1692e47f [match] > bytenr 67108864 > flags 0x1 > ( WRITTEN ) > magic _BHRfS_M [match] > fsid 7f5aecd6-40fe-45ce-90c3-e86bacc4bf6f > label samba_fs > generation 770740 > root 16187774615552 > sys_array_size 355 > chunk_root_generation 755799 > root_level 1 > chunk_root 24331161698304 > chunk_root_level 1 > log_root 0 > log_root_transid 0 > log_root_level 0 > total_bytes 23999996231680 > bytes_used 22205028102144 > sectorsize 4096 > nodesize 16384 > leafsize 16384 > stripesize 4096 > root_dir 6 > num_devices 1 > compat_flags 0x0 > compat_ro_flags 0x0 > incompat_flags 0x169 > ( MIXED_BACKREF | > COMPRESS_LZO | > BIG_METADATA | > EXTENDED_IREF | > SKINNY_METADATA ) > csum_type 0 > csum_size 4 > cache_generation 770740 > uuid_tree_generation 770740 > dev_item.uuid dd8c8d66-b6f5-48d8-9d5e-6f56b2ad4751 > dev_item.fsid 7f5aecd6-40fe-45ce-90c3-e86bacc4bf6f [match] > dev_item.type 0 > dev_item.total_bytes 23999996231680 > dev_item.bytes_used 23274943676416 > dev_item.io_align 4096 > dev_item.io_width 4096 > dev_item.sector_size 4096 > dev_item.devid 1 > dev_item.dev_group 0 > dev_item.seek_speed 0 > dev_item.bandwidth 0 > dev_item.generation 0 > > superblock: bytenr=274877906944, device=/dev/sdb > --------------------------------------------------------- > csum 0xeb15b24e [match] > bytenr 274877906944 > flags 0x1 > ( WRITTEN ) > magic _BHRfS_M [match] > fsid 7f5aecd6-40fe-45ce-90c3-e86bacc4bf6f > label samba_fs > generation 770740 > root 16187774615552 > sys_array_size 355 > chunk_root_generation 755799 > root_level 1 > chunk_root 24331161698304 > chunk_root_level 1 > log_root 0 > log_root_transid 0 > log_root_level 0 > total_bytes 23999996231680 > bytes_used 22205028102144 > sectorsize 4096 > nodesize 16384 > leafsize 16384 > stripesize 4096 > root_dir 6 > num_devices 1 > compat_flags 0x0 > compat_ro_flags 0x0 > incompat_flags 0x169 > ( MIXED_BACKREF | > COMPRESS_LZO | > BIG_METADATA | > EXTENDED_IREF | > SKINNY_METADATA ) > csum_type 0 > csum_size 4 > cache_generation 770740 > uuid_tree_generation 770740 > dev_item.uuid dd8c8d66-b6f5-48d8-9d5e-6f56b2ad4751 > dev_item.fsid 7f5aecd6-40fe-45ce-90c3-e86bacc4bf6f [match] > dev_item.type 0 > dev_item.total_bytes 23999996231680 > dev_item.bytes_used 23274943676416 > dev_item.io_align 4096 > dev_item.io_width 4096 > dev_item.sector_size 4096 > dev_item.devid 1 > dev_item.dev_group 0 > dev_item.seek_speed 0 > dev_item.bandwidth 0 > dev_item.generation 0 > > > > > > > > > > -- > > Best Regards > > > > > YunFu Li > System Engineer > Chengdu Kanghong Pharmaceuticals Group Co., Ltd > No. 36, Shu XiRoad, Chengdu, Sichuan Province, China > Ext.:4004 | > Liyunfu@xxxxxxxx| www.cnkh.com > > > > > ------------------------------------------------------------- > 本邮件及其附件内容系我司保密信息，仅向收件人提供。若您不是本邮件指定收件人，敬请立即删除本邮件并与发件人联系，同时请勿以任何方式复制、使用及传播。多谢合作！ > > The information contained in this E-mail and its > attachment(s) are our confidential information and are intended solely for the addressees. 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