From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.kundenserver.de ([212.227.126.187]:52812 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751207AbbEZUPG convert rfc822-to-8bit (ORCPT ); Tue, 26 May 2015 16:15:06 -0400 Date: Tue, 26 May 2015 22:15:00 +0200 (CEST) From: Felix Koop Reply-To: Felix Koop To: linux-btrfs , Qu Wenruo Message-ID: <1413519748.49215.1432671300490.JavaMail.open-xchange@oxbsltgw01.schlund.de> In-Reply-To: <55640AF3.2090502@cn.fujitsu.com> References: <508094243.133459.1432569980190.JavaMail.open-xchange@oxbsltgw09.schlund.de> <55640AF3.2090502@cn.fujitsu.com> Subject: Re: Help needed to recover a RAID5 btrfs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: > Qu Wenruo hat am 26. Mai 2015 um 07:56 geschrieben: > > > Label: none uuid: 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf > > Total devices 3 FS bytes used 213.96GiB > > devid 2 size 150.00GiB used 108.53GiB path /dev/mapper/Data1vg-afs0 > > devid 4 size 150.00GiB used 108.53GiB path /dev/mapper/Data3vg-afs0 > > *** Some devices missing > The device 3, I guest it's /dev/mapper/data2vg-afs0, does it still > exists in /dev/mapper? No, the disk crashed, so that the device does no longer exist. > Need some extra info: > btrfs-show-super -a -f /dev/mapper/Data1vg-afs0 root@server:~# btrfs-show-super -a -f /dev/mapper/Data1vg-afs0 superblock: bytenr=65536, device=/dev/mapper/Data1vg-afs0 --------------------------------------------------------- csum 0xc33db89c [match] bytenr 65536 flags 0x1 magic _BHRfS_M [match] fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf label generation 35278 root 1111813750784 sys_array_size 161 chunk_root_generation 33824 root_level 1 chunk_root 1111721295872 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 483183820800 bytes_used 229738524672 sectorsize 4096 nodesize 16384 leafsize 16384 stripesize 4096 root_dir 6 num_devices 3 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0xe1 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | RAID56 ) csum_type 0 csum_size 4 cache_generation 35278 uuid_tree_generation 35278 dev_item.uuid 5e5332c3-9e02-4b86-a84e-709f6ac4196b dev_item.fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf [match] dev_item.type 0 dev_item.total_bytes 161061273600 dev_item.bytes_used 116534542336 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 2 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1111721246720) chunk length 67108864 owner 2 type SYSTEM|RAID5 num_stripes 3 stripe 0 devid 2 offset 1048576 stripe 1 devid 4 offset 1048576 stripe 2 devid 3 offset 1048576 backup_roots[4]: backup 0: backup_tree_root: 1111813750784 gen: 35278 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111813963776 gen: 35278 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111814504448 gen: 35278 level: 1 backup_csum_root: 1111814963200 gen: 35278 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 backup 1: backup_tree_root: 1111811768320 gen: 35275 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111808262144 gen: 35275 level: 2 backup_fs_root: 1111808081920 gen: 35275 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111814733824 gen: 35275 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 2: backup_tree_root: 1111816585216 gen: 35276 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111815340032 gen: 35276 level: 2 backup_fs_root: 1111808983040 gen: 35277 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111818010624 gen: 35276 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 3: backup_tree_root: 1111842062336 gen: 35277 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111825956864 gen: 35277 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111842095104 gen: 35277 level: 1 backup_csum_root: 1111842160640 gen: 35277 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 superblock: bytenr=67108864, device=/dev/mapper/Data1vg-afs0 --------------------------------------------------------- csum 0x635c9052 [match] bytenr 67108864 flags 0x1 magic _BHRfS_M [match] fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf label generation 35278 root 1111813750784 sys_array_size 161 chunk_root_generation 33824 root_level 1 chunk_root 1111721295872 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 483183820800 bytes_used 229738524672 sectorsize 4096 nodesize 16384 leafsize 16384 stripesize 4096 root_dir 6 num_devices 3 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0xe1 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | RAID56 ) csum_type 0 csum_size 4 cache_generation 35278 uuid_tree_generation 35278 dev_item.uuid 5e5332c3-9e02-4b86-a84e-709f6ac4196b dev_item.fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf [match] dev_item.type 0 dev_item.total_bytes 161061273600 dev_item.bytes_used 116534542336 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 2 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1111721246720) chunk length 67108864 owner 2 type SYSTEM|RAID5 num_stripes 3 stripe 0 devid 2 offset 1048576 stripe 1 devid 4 offset 1048576 stripe 2 devid 3 offset 1048576 backup_roots[4]: backup 0: backup_tree_root: 1111813750784 gen: 35278 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111813963776 gen: 35278 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111814504448 gen: 35278 level: 1 backup_csum_root: 1111814963200 gen: 35278 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 backup 1: backup_tree_root: 1111811768320 gen: 35275 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111808262144 gen: 35275 level: 2 backup_fs_root: 1111808081920 gen: 35275 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111814733824 gen: 35275 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 2: backup_tree_root: 1111816585216 gen: 35276 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111815340032 gen: 35276 level: 2 backup_fs_root: 1111808983040 gen: 35277 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111818010624 gen: 35276 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 3: backup_tree_root: 1111842062336 gen: 35277 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111825956864 gen: 35277 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111842095104 gen: 35277 level: 1 backup_csum_root: 1111842160640 gen: 35277 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 > btrfs-show-super -a -f /dev/mapper/Data2vg-afs0 (If that is device3 > and exists) As I said, the device does no longer exist, because the disk crashed. > btrfs-show-super -a -f /dev/mapper/Data3vg-afs0 root@server:~# btrfs-show-super -a -f /dev/mapper/Data3vg-afs0 superblock: bytenr=65536, device=/dev/mapper/Data3vg-afs0 --------------------------------------------------------- csum 0xe3500af0 [match] bytenr 65536 flags 0x1 magic _BHRfS_M [match] fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf label generation 35278 root 1111813750784 sys_array_size 161 chunk_root_generation 33824 root_level 1 chunk_root 1111721295872 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 483183820800 bytes_used 229738524672 sectorsize 4096 nodesize 16384 leafsize 16384 stripesize 4096 root_dir 6 num_devices 3 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0xe1 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | RAID56 ) csum_type 0 csum_size 4 cache_generation 35278 uuid_tree_generation 35278 dev_item.uuid ce22bfec-b82d-42cf-8703-8f1eaa17a1ec dev_item.fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf [match] dev_item.type 0 dev_item.total_bytes 161061273600 dev_item.bytes_used 116534542336 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 4 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1111721246720) chunk length 67108864 owner 2 type SYSTEM|RAID5 num_stripes 3 stripe 0 devid 2 offset 1048576 stripe 1 devid 4 offset 1048576 stripe 2 devid 3 offset 1048576 backup_roots[4]: backup 0: backup_tree_root: 1111813750784 gen: 35278 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111813963776 gen: 35278 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111814504448 gen: 35278 level: 1 backup_csum_root: 1111814963200 gen: 35278 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 backup 1: backup_tree_root: 1111811768320 gen: 35275 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111808262144 gen: 35275 level: 2 backup_fs_root: 1111808081920 gen: 35275 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111814733824 gen: 35275 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 2: backup_tree_root: 1111816585216 gen: 35276 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111815340032 gen: 35276 level: 2 backup_fs_root: 1111808983040 gen: 35277 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111818010624 gen: 35276 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 3: backup_tree_root: 1111842062336 gen: 35277 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111825956864 gen: 35277 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111842095104 gen: 35277 level: 1 backup_csum_root: 1111842160640 gen: 35277 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 superblock: bytenr=67108864, device=/dev/mapper/Data3vg-afs0 --------------------------------------------------------- csum 0x4331223e [match] bytenr 67108864 flags 0x1 magic _BHRfS_M [match] fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf label generation 35278 root 1111813750784 sys_array_size 161 chunk_root_generation 33824 root_level 1 chunk_root 1111721295872 chunk_root_level 1 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 483183820800 bytes_used 229738524672 sectorsize 4096 nodesize 16384 leafsize 16384 stripesize 4096 root_dir 6 num_devices 3 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0xe1 ( MIXED_BACKREF | BIG_METADATA | EXTENDED_IREF | RAID56 ) csum_type 0 csum_size 4 cache_generation 35278 uuid_tree_generation 35278 dev_item.uuid ce22bfec-b82d-42cf-8703-8f1eaa17a1ec dev_item.fsid 7d4b023a-a1ef-4991-b01d-31e7c4fdfbcf [match] dev_item.type 0 dev_item.total_bytes 161061273600 dev_item.bytes_used 116534542336 dev_item.io_align 4096 dev_item.io_width 4096 dev_item.sector_size 4096 dev_item.devid 4 dev_item.dev_group 0 dev_item.seek_speed 0 dev_item.bandwidth 0 dev_item.generation 0 sys_chunk_array[2048]: item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 1111721246720) chunk length 67108864 owner 2 type SYSTEM|RAID5 num_stripes 3 stripe 0 devid 2 offset 1048576 stripe 1 devid 4 offset 1048576 stripe 2 devid 3 offset 1048576 backup_roots[4]: backup 0: backup_tree_root: 1111813750784 gen: 35278 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111813963776 gen: 35278 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111814504448 gen: 35278 level: 1 backup_csum_root: 1111814963200 gen: 35278 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 backup 1: backup_tree_root: 1111811768320 gen: 35275 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111808262144 gen: 35275 level: 2 backup_fs_root: 1111808081920 gen: 35275 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111814733824 gen: 35275 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 2: backup_tree_root: 1111816585216 gen: 35276 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111815340032 gen: 35276 level: 2 backup_fs_root: 1111808983040 gen: 35277 level: 2 backup_dev_root: 1112427905024 gen: 33824 level: 1 backup_csum_root: 1111818010624 gen: 35276 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738541056 backup_num_devices: 3 backup 3: backup_tree_root: 1111842062336 gen: 35277 level: 1 backup_chunk_root: 1111721295872 gen: 33824 level: 1 backup_extent_root: 1111825956864 gen: 35277 level: 2 backup_fs_root: 1111836409856 gen: 35277 level: 2 backup_dev_root: 1111842095104 gen: 35277 level: 1 backup_csum_root: 1111842160640 gen: 35277 level: 2 backup_total_bytes: 483183820800 backup_bytes_used: 229738524672 backup_num_devices: 3 > > Maybe we can use old super to restore it to a mountable status. > > If you have spare space to backup all the 3 devices, it's recommended to > do it, as some repair tips may cause some write into disk, and may even > make things worse. > Will do. I have enough space. Mit freundlichen Grüßen/Kind regards Felix Koop