Hello,
I have a system that has been in production for a few years. The SAN the VM
was running on had a hardware failure about a month ago and now one of the two
btrfs filesystems will remount after boot read-only. Here is the system
information:
uname -a
Linux retain 3.0.101-0.47.71-default #1 SMP Thu Nov 12 12:22:22 UTC 2015
(b5b212e) x86_64 x86_64 x86_64 GNU/Linux
Btrfs --version
Btrfs v0.20+
Btrfs fi show
Label: none uuid: f1e23038-22c1-44b2-8cf8-a3ca6363d2f4
Total devices 1 FS bytes used 303.01GiB
devid 1 size 1024.00GiB used 351.04GiB path /dev/dm-2
Label: none uuid: 85e58f4e-ce56-4b11-9ed9-16abeead8863
Total devices 1 FS bytes used 83.83GiB
devid 1 size 149.49GiB used 101.49GiB path /dev/dm-0
Btrfs v0.20+
Btrfs fi df /retain
Data: total=261.01GiB, used=259.23GiB
System, DUP: total=8.00MiB, used=40.00KiB
System: total=4.00MiB, used=0.00
Metadata, DUP: total=45.00GiB, used=43.77GiB
Metadata: total=8.00MiB, used=0.00
Dmesg--Can provide the full output if needed via attachment. Here is where the
fs remounts read-only:
[ 55.181245] btrfs: parent transid verify failed on 153295646720 wanted
230487 found 230484
[ 55.187980] btrfs: parent transid verify failed on 153295646720 wanted
230487 found 230484
[ 55.187991] BTRFS debug (device dm-2): run_one_delayed_ref returned -5
[ 55.187994] ------------[ cut here ]------------
[ 55.188021] WARNING: at
/usr/src/packages/BUILD/kernel-default-3.0.101/linux-3.0/fs/btrfs/super.c:255
__btrfs_abort_transaction+0x60/0x170 [btrfs]()
[ 55.188024] Hardware name: VMware Virtual Platform
[ 55.188026] btrfs: Transaction aborted (error -5)
[ 55.188028] Modules linked in: acpiphp microcode fuse xfs ext3 jbd mbcache
loop sr_mod ppdev vmw_balloon(X) i2c_piix4 intel_agp pciehp ipv6_lib cdrom
parport_pc shpchp parport rtc_cmos intel_gtt pci_hotplug floppy i2c_core sg
container ac mptctl serio_raw button pcspkr btrfs zlib_deflate crc32c libcrc32c
dm_mirror dm_region_hash dm_log linear sd_mod crc_t10dif processor thermal_sys
hwmon scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_dh dm_snapshot
dm_mod vmw_pvscsi vmxnet3 ata_generic ata_piix libata mptspi mptscsih mptbase
scsi_transport_spi scsi_mod
[ 55.188071] Supported: Yes, External
[ 55.188075] Pid: 1985, comm: sync Tainted: G X
3.0.101-0.47.71-default #1
[ 55.188077] Call Trace:
[ 55.188090] [<ffffffff81004b95>] dump_trace+0x75/0x300
[ 55.188097] [<ffffffff814638a3>] dump_stack+0x69/0x6f
[ 55.188104] [<ffffffff81061f07>] warn_slowpath_common+0x87/0xe0
[ 55.188109] [<ffffffff81062015>] warn_slowpath_fmt+0x45/0x60
[ 55.188125] [<ffffffffa018eb40>] __btrfs_abort_transaction+0x60/0x170
[btrfs]
[ 55.188152] [<ffffffffa01ab466>] btrfs_run_delayed_refs+0x3a6/0x520 [btrfs]
[ 55.188192] [<ffffffffa01bb3de>] btrfs_commit_transaction+0x42e/0xa00
[btrfs]
[ 55.188228] [<ffffffff8118a0f2>] __sync_filesystem+0x62/0xb0
[ 55.188234] [<ffffffff8116133a>] iterate_supers+0x6a/0xc0
[ 55.188239] [<ffffffff8118a1b2>] sys_sync+0x52/0x80
[ 55.188244] [<ffffffff8146e772>] system_call_fastpath+0x16/0x1b
[ 55.188251] [<00007f45758cafc7>] 0x7f45758cafc6
[ 55.188253] ---[ end trace c5a604849514ffcd ]---
[ 55.188257] BTRFS error (device dm-2) in btrfs_run_delayed_refs:2688:
errno=-5 IO failure
[ 55.188259] BTRFS info (device dm-2): forced readonly
[ 55.188263] BTRFS warning (device dm-2): Skipping commit of aborted
transaction.
[ 55.188266] BTRFS error (device dm-2) in cleanup_transaction:1538: errno=-5
IO failure
Thank you for your assistance,
Jeff Michels
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