- RAID10 btrfs volume consisting of 4 disks.
- One disk failed, was replaced, resync started
(`btrfs dev add /dev/sdf /srv; btrfs dev del missing /srv`)
- Another disk failed before resync was done.
Disk was replaced, resync restarted.
(`btrfs dev add /dev/sdc /srv; btrfs dev del missing /srv`)
Naturally I don''t expect it to recover from 2 failures, but
doing the attempt was worth a try, for this throws kernel warnings
(below).
Can I somehow just have all inodes unlinked from the filesystem that are
not recoverable? That would be preferable to re-mkfs.
The current status per fi show:
Label: ''srv'' uuid: 88300cd5-dbcb-4147-9ee4-c65a1c895e1d
Total devices 6 FS bytes used 1.71TiB
devid 7 size 1.36TiB used 29.50GiB path /dev/sdc
devid 2 size 1.36TiB used 1.13TiB path /dev/sdd
devid 3 size 1.36TiB used 1.13TiB path /dev/sde
devid 6 size 1.36TiB used 377.00GiB path /dev/sdf
*** Some devices missing
[ 1013.381148] btrfs: found 5451 extents
[ 1105.177601] btrfs: block rsv returned -28
[ 1105.177608] ------------[ cut here ]------------
[ 1105.177684] WARNING: at
/home/abuild/rpmbuild/BUILD/kernel-default-3.4.4~jng6/linux-3.4/fs/btrfs/extent-tree.c:6219
use_block_rsv+0xb8/0x104 [btrfs]()
[ 1105.177692] Hardware name: RX945GC
[ 1105.177696] Modules linked in: f71882fg nfs fscache nfsd lockd nfs_acl
auth_rpcgss sunrpc bonding mperf btrfs zlib_deflate crc32c libcrc32c
snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer
i915 snd drm_kms_helper drm coretemp sg intel_agp led_class soundcore
snd_page_alloc r8169 iTCO_wdt iTCO_vendor_support microcode i2c_i801
i2c_algo_bit intel_gtt agpgart i2c_core button pcspkr mii rng_core video edd
autofs4 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy
async_tx raid10 raid0 raid1 md_mod ata_piix uhci_hcd ehci_hcd usbcore usb_common
processor thermal_sys hwmon
[ 1105.177810] Pid: 2912, comm: btrfs Not tainted 3.4.4-jng6-default #1
[ 1105.177815] Call Trace:
[ 1105.177842] [<ffffffff81003b0e>] dump_trace+0x89/0x1e9
[ 1105.177858] [<ffffffff813bdd45>] dump_stack+0x69/0x6f
[ 1105.177871] [<ffffffff8102d9d4>] warn_slowpath_common+0x78/0x8c
[ 1105.177937] [<ffffffffa02fcaf6>] use_block_rsv+0xb8/0x104 [btrfs]
[ 1105.178092] [<ffffffffa02fef88>] btrfs_alloc_free_block+0x29/0x1bd
[btrfs]
[ 1105.178236] [<ffffffffa02f17fe>] __btrfs_cow_block+0x10e/0x350 [btrfs]
[ 1105.178338] [<ffffffffa02f1b34>] btrfs_cow_block+0xf4/0x13f [btrfs]
[ 1105.178441] [<ffffffffa02f4753>] btrfs_search_slot+0x230/0x531 [btrfs]
[ 1105.178581] [<ffffffffa0342990>] do_relocation+0x104/0x3fe [btrfs]
[ 1105.179050] [<ffffffffa0342d29>] finish_pending_nodes+0x9f/0x103
[btrfs]
[ 1105.179518] [<ffffffffa03456b5>] relocate_tree_blocks+0x124/0x14a
[btrfs]
[ 1105.179994] [<ffffffffa034624e>] relocate_block_group+0x21a/0x439
[btrfs]
[ 1105.180774] [<ffffffffa03465ac>]
btrfs_relocate_block_group+0x13f/0x267 [btrfs]
[ 1105.181471] [<ffffffffa032b849>]
btrfs_relocate_chunk.isra.51+0x4b/0x2ce [btrfs]
[ 1105.182037] [<ffffffffa032e532>] btrfs_shrink_device+0x1fa/0x34d
[btrfs]
[ 1105.182623] [<ffffffffa033011f>] btrfs_rm_device+0x1f4/0x4a6 [btrfs]
[ 1105.183206] [<ffffffffa0331ad2>] btrfs_ioctl_rm_dev+0x95/0xbe [btrfs]
[ 1105.183797] [<ffffffffa0335632>] btrfs_ioctl+0x3b4/0x6d6 [btrfs]
[ 1105.184369] [<ffffffff8110f9af>] do_vfs_ioctl+0x240/0x254
[ 1105.184390] [<ffffffff8110fa0e>] sys_ioctl+0x4b/0x71
[ 1105.184412] [<ffffffff813d8b79>] system_call_fastpath+0x16/0x1b
[ 1105.184455] [<00007fb47191a837>] 0x7fb47191a836
[ 1105.184464] ---[ end trace 7a7259f915d317e1 ]---
(many of these as it attempted to resync/rebalance)
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