When I try to run any of the commands like init-csum-tree etc the btrfs program core dumps. Here is an example
root@NAS:/root# btrfsck --init-csum-tree /dev/sdb1 Creating a new CRC tree warning, device 2 is missing parent transid verify failed on 8388608 wanted 136966 found 136967 parent transid verify failed on 8388608 wanted 136966 found 136967 Ignoring transid failure Checking filesystem on /dev/sdb1 UUID: f89c12fb-2304-4dce-bed5-fda008b86bde Reinitialize checksum tree extent-tree.c:2703: btrfs_reserve_extent: BUG_ON `ret` triggered, value -28 btrfs check[0x44e371] btrfs check(btrfs_reserve_extent+0xbc6)[0x4540e6] btrfs check(btrfs_alloc_free_block+0x5a)[0x45415c] btrfs check[0x41d788] btrfs check(cmd_check+0x1270)[0x430633] btrfs check(main+0x155)[0x40a813] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f4a89555830] btrfs check(_start+0x29)[0x40a409] Aborted (core dumped) On Sun, Jan 29, 2017 at 8:12 AM, Subscription Account <[email protected]> wrote: > Hi, > > I had to remove one disk from raid 1 and I rebooted the system and was > able to mount in degraded mode. Then I powered off the system added a > new disk and when I am trying to mount the btrfs filesystem in > degraded mode it will no longer mount it read-write. I can mount > read-only though. > > I tried running btrfs-zero-log as well and that gices a core dump. > > My system details as follows: > > rajeev@NAS:~$ uname -a > Linux NAS 4.4.0-59-generic #80-Ubuntu SMP Fri Jan 6 17:47:47 UTC 2017 > x86_64 x86_64 x86_64 GNU/Linux > > root@NAS:~# btrfs --version > Btrfs v3.12 > > root@NAS:~# btrfs fi show > Label: none uuid: f89c12fb-2304-4dce-bed5-fda008b86bde > Total devices 2 FS bytes used 2.49TiB > devid 1 size 2.73TiB used 2.52TiB path /dev/sdb1 > *** Some devices missing > > Btrfs v3.12 > > root@NAS:~# mount -o degraded /dev/sdb1 /local/nas > mount: wrong fs type, bad option, bad superblock on /dev/sdb1, > missing codepage or helper program, or other error > > In some cases useful info is found in syslog - try > dmesg | tail or so. > > root@NAS:~# dmesg | tail > [ 2506.816795] BTRFS: missing devices(1) exceeds the limit(0), > writeable mount is not allowed > [ 2506.878031] BTRFS: open_ctree failed > [ 4590.339548] BTRFS info (device sdb1): allowing degraded mounts > [ 4590.505739] BTRFS info (device sdb1): bdev /dev/sdb1 errs: wr 0, rd > 90, flush 0, corrupt 0, gen 0 > [ 4609.481310] BTRFS: missing devices(1) exceeds the limit(0), > writeable mount is not allowed > [ 4609.536509] BTRFS: open_ctree failed > [ 4852.498305] BTRFS info (device sdb1): allowing degraded mounts > [ 4853.294311] BTRFS info (device sdb1): bdev /dev/sdb1 errs: wr 0, rd > 90, flush 0, corrupt 0, gen 0 > [ 4873.026855] BTRFS: missing devices(1) exceeds the limit(0), > writeable mount is not allowed > [ 4873.083840] BTRFS: open_ctree failed > > root@NAS:~# mount -o degraded,ro /dev/sdb1 /local/nas > > root@NAS:~# btrfs fi df /local/nas > Data, RAID1: total=2.51TiB, used=2.49TiB > Data, single: total=1.01GiB, used=88.27MiB > System, RAID1: total=8.00MiB, used=352.00KiB > System, single: total=4.00MiB, used=12.00KiB > Metadata, RAID1: total=6.00GiB, used=5.01GiB > Metadata, single: total=8.00MiB, used=3.31MiB > unknown, single: total=512.00MiB, used=0.00 > > In the read-only mode I am not able to add a new device or replace :(. > Please help. > > Thanks, > > -- > raj -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
