I have a BTRFS partititon on a Toshiba TR200 SSD . Two days ago, it got to readonly mode. Inspecting the dmesg I got this : > > [ 3490.935497] BTRFS info (device sdc2): disk space caching is enabled > [ 3490.935500] BTRFS info (device sdc2): has skinny extents > [ 3490.968534] BTRFS info (device sdc2): enabling ssd optimizations > [ 3490.975507] ------------[ cut here ]------------ > [ 3490.975509] BTRFS: Transaction aborted (error -17) > [ 3490.975614] WARNING: CPU: 6 PID: 22107 at /home/kernel/COD/linux/fs/btrfs/extent-tree.c:3083 btrfs_run_delayed_refs+0x170/0x1c0 [btrfs] > [ 3490.975615] Modules linked in: xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 af_key l2tp_ppp l2tp_netlink l2tp_core ip6_udp_tunnel udp_tunnel xfrm_algo pppox snd_hrtimer zram binfmt_misc nls_iso8859_1 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core edac_mce_amd snd_hwdep snd_pcm kvm_amd ccp kvm snd_seq_midi snd_seq_midi_event ir_rc6_decoder snd_rawmidi irqbypass snd_seq rc_rc6_mce crct10dif_pclmul crc32_pclmul ghash_clmulni_intel mceusb joydev input_leds rc_core snd_seq_device pcbc snd_timer aesni_intel aes_x86_64 snd soundcore crypto_simd glue_helper mac_hid cryptd parport_serial fam15h_power shpchp k10temp sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq hid_generic usbhid hid > [ 3490.975666] amdkfd amd_iommu_v2 amdgpu chash gpu_sched i2c_algo_bit ttm mxm_wmi drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops r8169 drm ahci mii i2c_piix4 libahci wmi > [ 3490.975684] CPU: 6 PID: 22107 Comm: mount Not tainted 4.16.2-041602-generic #201804121130 > [ 3490.975685] Hardware name: MSI MS-7974/970A-G43 PLUS (MS-7974), BIOS V1.1 07/04/2016 > [ 3490.975713] RIP: 0010:btrfs_run_delayed_refs+0x170/0x1c0 [btrfs] > [ 3490.975714] RSP: 0018:ffffb5a486c0f8c0 EFLAGS: 00010282 > [ 3490.975716] RAX: 0000000000000000 RBX: ffff9f4cab66df08 RCX: 0000000000000006 > [ 3490.975718] RDX: 0000000000000007 RSI: 0000000000000096 RDI: ffff9f4cbed964b0 > [ 3490.975719] RBP: ffffb5a486c0f910 R08: 000000000000043e R09: 0000000000000004 > [ 3490.975721] R10: ffff9f4ab44cfc40 R11: 0000000000000001 R12: ffff9f4ab44cfc40 > [ 3490.975722] R13: ffff9f4a9bb94800 R14: ffff9f4cab66df08 R15: 0000000000000038 > [ 3490.975725] FS: 00007f2f0355d080(0000) GS:ffff9f4cbed80000(0000) knlGS:0000000000000000 > [ 3490.975726] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 3490.975728] CR2: 000055ffe06115c0 CR3: 000000023aab0000 CR4: 00000000000406e0 > [ 3490.975729] Call Trace: > [ 3490.975762] btrfs_commit_transaction+0x45/0x8e0 [btrfs] > [ 3490.975795] btrfs_recover_log_trees+0x416/0x4a0 [btrfs] > [ 3490.975828] ? replay_one_extent+0x7d0/0x7d0 [btrfs] > [ 3490.975856] open_ctree+0x1feb/0x2440 [btrfs] > [ 3490.975882] btrfs_mount_root+0x6d1/0x7a0 [btrfs] > [ 3490.975906] ? btrfs_mount_root+0x6d1/0x7a0 [btrfs] > [ 3490.975912] mount_fs+0x37/0x150 > [ 3490.975915] ? mount_fs+0x37/0x150 > [ 3490.975918] ? alloc_vfsmnt+0x1b3/0x230 > [ 3490.975921] vfs_kern_mount.part.23+0x5d/0x110 > [ 3490.975924] vfs_kern_mount+0x13/0x20 > [ 3490.975951] btrfs_mount+0x182/0x950 [btrfs] > [ 3490.975955] ? cpumask_next+0x1b/0x20 > [ 3490.975958] ? pcpu_alloc+0x31b/0x650 > [ 3490.975962] mount_fs+0x37/0x150 > [ 3490.975964] ? mount_fs+0x37/0x150 > [ 3490.975966] ? alloc_vfsmnt+0x1b3/0x230 > [ 3490.975969] vfs_kern_mount.part.23+0x5d/0x110 > [ 3490.975972] do_mount+0x5ed/0xce0 > [ 3490.975976] ? memdup_user+0x4f/0x80 > [ 3490.975979] SyS_mount+0x98/0xe0 > [ 3490.975982] do_syscall_64+0x73/0x130 > [ 3490.975986] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 > [ 3490.975988] RIP: 0033:0x7f2f02e423ca > [ 3490.975990] RSP: 002b:00007ffc9434edd8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 > [ 3490.975992] RAX: ffffffffffffffda RBX: 00005588bc39da40 RCX: 00007f2f02e423ca > [ 3490.975994] RDX: 00005588bc3ab850 RSI: 00005588bc39dc40 RDI: 00005588bc39dc20 > [ 3490.975995] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f2f02e8e1b0 > [ 3490.975996] R10: 00000000c0ed0000 R11: 0000000000000206 R12: 00005588bc39dc20 > [ 3490.975998] R13: 00005588bc3ab850 R14: 0000000000000000 R15: 00007f2f0336a8a4 > [ 3490.975999] Code: 1f 40 00 eb c4 48 8b 53 50 f0 48 0f ba aa d8 cd 00 00 02 72 1b 83 f8 fb 74 34 89 c6 48 c7 c7 c0 a5 7c c0 89 45 d0 e8 40 a4 b6 e7 <0f> 0b 8b 45 d0 89 c1 ba 0b 0c 00 00 48 c7 c6 00 39 7c c0 48 89 > [ 3490.976045] ---[ end trace 633ae76f1f0eee99 ]--- > [ 3490.976048] BTRFS: error (device sdc2) in btrfs_run_delayed_refs:3083: errno=-17 Object already exists > [ 3490.976062] BTRFS: error (device sdc2) in btrfs_replay_log:2308: errno=-17 Object already exists (Failed to recover log tree) > [ 3490.976172] BTRFS error (device sdc2): cleaner transaction attach returned -30 > [ 3491.002005] BTRFS error (device sdc2): open_ctree failed I try to reboot to load a older kernel, thinking that was a issue of the last kernel updater. I can't mount the partition any more. Trying to mount the BTRFS partition from a Live dvd, gets the same error. I try to execute btrfs check without any sucess : > > sudo btrfs check -p --readonly /dev/sdc2 > Checking filesystem on /dev/sdc2 > UUID: 595cf1ca-7df2-46ff-8472-a2789f0bab77 > check/main.c:3654: check_owner_ref: BUG_ON `rec->is_root` triggered, value 1 > btrfs(+0x4b7d0)[0x559daa67e7d0] > btrfs(+0x12df8)[0x559daa645df8] > btrfs(+0x4bd21)[0x559daa67ed21] > btrfs(+0x4efdb)[0x559daa681fdb] > btrfs(+0x4fbdf)[0x559daa682bdf] > btrfs(+0x505f1)[0x559daa6835f1] > btrfs(cmd_check+0x133f)[0x559daa686926] > btrfs(main+0x143)[0x559daa649c87] > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7f5ac3a59b97] > btrfs(_start+0x2a)[0x559daa649cca] > 'sudo btrfs check -p --readonly…' terminated by signal SIGABRT (Abort) > I think that the partition can't be recovered. However, I would like to know why has happened this or how avoid this problem as I would like to keep using BTRFS. Smart values shows that the SSD it's ok but before doing a reinstall I would try to stress it to see any signal of problems. Info about my system and versions : lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.1 LTS Release: 18.04 Codename: bionic uname -a Linux blackbox-linux 4.16.2-041602-generic #201804121130 SMP Thu Apr 12 11:32:17 UTC 2018 x86_64 x86_64 x86_64 GNU/L btrfs --version btrfs-progs v4.15.1 mount options on fstab : defaults,discard,compress=lzo
