Hi, i got this message while i was running a balance, after adding the two smaller disks. But it seems that the Bug was triggered from a java process working on that disk?! After the Bug message the balance process was blocked. There was no further process or diskload from that process. I had to reset the system. [ 10.072178] Btrfs loaded [ 10.072750] device fsid 51b929a2-163f-4b47-8ac4-038670e80676 devid 3 transid 26081 /dev/sdc [ 10.073757] btrfs: disk space caching is enabled [ 10.074134] btrfs: failed to read the system array on sdc [ 10.074400] btrfs: open_ctree failed But after a manual mount everything was "fine" again: [ 104.990461] device fsid 51b929a2-163f-4b47-8ac4-038670e80676 devid 1 transid 26081 /dev/sdb [ 105.407555] device fsid 51b929a2-163f-4b47-8ac4-038670e80676 devid 2 transid 26081 /dev/sdd [ 105.810686] device fsid 51b929a2-163f-4b47-8ac4-038670e80676 devid 3 transid 26081 /dev/sdc [ 117.531293] device fsid 51b929a2-163f-4b47-8ac4-038670e80676 devid 1 transid 26081 /dev/sdb [ 117.532602] btrfs: disk space caching is enabled [ 120.927683] btrfs: unlinked 1 orphans [ 120.945804] btrfs: continuing balance [ 144.562543] btrfs: relocating block group 214777724928 flags 1 [ 149.250326] btrfs: unlinked 2 orphans Maybe this informations can help you to make the btrfs more stable - i really like the features :-) Kind regards Lars btrfs balance start dconvert=raid1 mconvert=raid1 /data/ uname -a Linux n40l 3.7.1 #1 SMP Mon Dec 31 09:55:24 CET 2012 x86_64 GNU/Linux btrfs fi show Label: none uuid: 51b929a2-163f-4b47-8ac4-038670e80676 Total devices 3 FS bytes used 2.14TB devid 3 size 1.36TB used 1.22TB path /dev/sdc devid 2 size 1.36TB used 1.22TB path /dev/sdd devid 1 size 2.73TB used 1.78TB path /dev/sdb Btrfs v0.20-rc1-37-g91d9eec [125072.382549] btrfs: relocating block group 214777724928 flags 1 [125109.399900] btrfs: found 185 extents [125124.476225] btrfs: found 185 extents [125128.126892] ------------[ cut here ]------------ [125128.130251] kernel BUG at fs/btrfs/inode.c:3865! [125128.133866] invalid opcode: 0000 [#1] SMP [125128.137439] Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp llc nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc btrfs zlib_deflate crc32c libcrc32c ext2 loop radeon evdev ttm drm_kms_helper drm snd_pcm snd_timer snd soundcore snd_page_alloc amd64_edac_mod k10temp edac_core tpm_tis sp5100_tco tpm processor i2c_piix4 i2c_algo_bit edac_mce_amd button tpm_bios pcspkr i2c_core kvm_amd kvm shpchp thermal_sys microcode ext4 mbcache jbd2 crc16 dm_mod sd_mod crc_t10dif ohci_hcd ahci libahci libata tg3 libphy scsi_mod ehci_hcd usbcore usb_common [125128.157060] CPU 0 [125128.157100] Pid: 6850, comm: java Not tainted 3.7.1 #1 HP ProLiant MicroServer [125128.165237] RIP: 0010:[<ffffffffa03e5e89>] [<ffffffffa03e5e89>] btrfs_evict_inode+0x202/0x2dc [btrfs] [125128.169520] RSP: 0018:ffff880050547df8 EFLAGS: 00010286 [125128.173785] RAX: 00000000ffffffe4 RBX: ffff88004fc7a5f8 RCX: 000000000000df3e [125128.178091] RDX: 000000000b690b69 RSI: ffff88000f947848 RDI: ffff88000f947890 [125128.182425] RBP: ffff880037c0f800 R08: 000000000000011a R09: ffff88005b13c598 [125128.186756] R10: ffff88005b13c598 R11: ffff88005b13c598 R12: ffff88005b13c598 [125128.191111] R13: ffff880073b15540 R14: 0000000000020000 R15: ffff880072518140 [125128.195498] FS: 00007fe624bbf700(0000) GS:ffff880077c00000(0000) knlGS:0000000000000000 [125128.199936] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [125128.204367] CR2: 00007fe62b929028 CR3: 00000000747fb000 CR4: 00000000000007f0 [125128.208852] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [125128.213325] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [125128.217781] Process java (pid: 6850, threadinfo ffff880050546000, task ffff8800131dd140) [125128.222310] Stack: [125128.226746] ffff880050547df0 0000000000000000 0000000000000000 ffff88004fc7a5f8 [125128.231282] ffff88004fc7a6f8 ffffffffa0428440 dead000000100100 ffff88004fc3a800 [125128.235783] ffff880074b8f890 ffffffff81123c45 ffff88004fc3a800 ffff88006bc5d0c0 [125128.240281] Call Trace: [125128.244734] [<ffffffff81123c45>] ? evict+0xa3/0x158 [125128.249244] [<ffffffff81121c44>] ? dentry_kill+0x150/0x16e [125128.253851] [<ffffffff811222d9>] ? dput+0xed/0xf9 [125128.258361] [<ffffffff81111d8c>] ? __fput+0x196/0x1ae [125128.262865] [<ffffffff8105a0c7>] ? task_work_run+0x7f/0x96 [125128.267384] [<ffffffff8100f563>] ? do_notify_resume+0x56/0x67 [125128.271891] [<ffffffff8105a185>] ? task_work_add+0x47/0x4e [125128.276405] [<ffffffff813938a2>] ? int_signal+0x12/0x17 [125128.280963] Code: ff ff 83 f8 e4 75 4f 48 8b 85 e8 01 00 00 48 89 da 48 89 ee 4c 89 e7 48 05 90 01 00 00 49 89 44 24 40 e8 cb 9f ff ff 85 c0 74 04 <0f> 0b eb fe 49 8b 44 24 28 48 89 ee 4c 89 e7 48 89 44 24 08 e8 [125128.290503] RIP [<ffffffffa03e5e89>] btrfs_evict_inode+0x202/0x2dc [btrfs] [125128.295170] RSP <ffff880050547df8> [125128.316881] ---[ end trace 9a9c4f2a5cfda34a ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html