Hi!
I really like the features of BTRFS, especially deduplication,
snapshotting and checksumming. However, when using it on my laptop the
last couple of years, it has became corrupted a lot of times.
Sometimes I have managed to fix the problems (at least so much that I
can continue to use the filesystem) with check --repair, but several
times I had to recreate the file system and reinstall the operating
system.
I am guessing the corruptions might be the results of unclean
shutdowns, mostly after system hangs, but also because of running out
of battery sometimes?
Furthermore, the power-led has recently started blinking (also when
the power-cable is plugged in), I guess because of an old and bad
battery. Maybe the current corruption also can have something to do
with this? However I almost always run with power cable plugged in in
last year, only on battery a few seconds a few times when moving the
laptop.
Currently, I can only mount the filesystem readonly, it goes readonly
automatically if I try to mount it normally.
When booting an OpenSUSE Tumbleweed-20180119 live-iso:
localhost:~ # uname -r
4.14.13-1-default
localhost:~ # btrfs --version
btrfs-progs v4.14.1
localhost:~ # btrfs check -p /dev/sda12
Checking filesystem on /dev/sda12
UUID:
d2819d5a-fd69-484b-bf34-f2b5692cbe1f
bad key ordering 159 160
bad block 690436964352
ERROR: errors found in extent allocation tree or chunk
allocation checking free
space cache [.]
checking fs roots [o]
checking csums
bad key ordering 159 160
Error looking up extent record -1
Right section didn't have a record
There are no
extents for csum range 22732550144-24923615232
Csum exists for 16303538176-24923615232 but
there is no extent record ERROR:
errors found in csum tree
found 344063430663 bytes
used, error(s) found
total csum bytes: 0
total tree bytes: 453410816
total fs tree bytes: 0
total
extent tree bytes: 452952064
btree space waste bytes: 140165932
file data blocks
allocated: 108462080
referenced 108462080
localhost:~ # btrfs inspect-internal dump-tree -b 690436964352
/dev/sda12
btrfs-progs v4.14.1
leaf
690436964352 items 170 free space 1811 generation 196864 owner 2
leaf 690436964352 flags 0x1(WRITTEN)
backref revision 1
fs uuid d2819d5a-fd69-484b-bf34-f2b5692cbe1f
chunk uuid
52f81fe6-893b-4432-9336-895057ee81e1
.
.
.
item 157 key (22732500992 EXTENT_ITEM 16384) itemoff 6538 itemsize 53
refs 1 gen 821 flags DATA
extent data backref root 287 objectid 51665 offset 0 count 1
item 158 key (22732517376 EXTENT_ITEM 16384) itemoff 6485 itemsize 53
refs 1 gen 821 flags DATA
extent data backref root 287 objectid 51666 offset 0 count 1
item 159 key (22732533760 EXTENT_ITEM 16384) itemoff 6485 itemsize 0
print-tree.c:428: print_extent_item: BUG_ON `item_size !=
sizeof(*ei0)` triggered, value 1
btrfs(+0x365c6)[0x55bdfaada5c6]
btrfs(print_extent_item+0x424)[0x55bdfaadb284]
btrfs(btrfs_print_leaf+0x94e)[0x55bdfaadbc1e]
btrfs(btrfs_print_tree+0x295)[0x55bdfaadcf05]
btrfs(cmd_inspect_dump_tree+0x734)[0x55bdfab1b024]
btrfs(main+0x7d)[0x55bdfaac7d4d]
/lib64/libc.so.6(__libc_start_main+0xea)[0x7ff42100ff4a]
btrfs(_start+0x2a)[0x55bdfaac7e5a]
Aborted (core dumped)
check --repair hangs after reporting "bad key ordering 159 160" with
no disk activity but constant high cpu usage.
localhost:~ # smartctl -a /dev/sda
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.14.13-1-default] (SUSE RPM)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Device Model: SanDisk SD8SB8U1T001122
Serial Number: 163076421231
LU WWN Device Id: 5 001b44 4a4dde388
Firmware Version: X4140000
User Capacity: 1,024,209,543,168 bytes [1.02 TB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-2 T13/2015-D revision 3
SATA Version is: SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Mon Jan 22 15:28:46 2018 EST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 0) seconds.
Offline data collection
capabilities: (0x11) SMART execute Offline immediate.
No Auto Offline data collection support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
No Conveyance Self-test supported.
No Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 10) minutes.
SMART Attributes Data Structure revision number: 4
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE
UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0032 100 100 --- Old_age
Always - 0
9 Power_On_Hours 0x0032 100 100 --- Old_age
Always - 7692
12 Power_Cycle_Count 0x0032 100 100 --- Old_age
Always - 496
165 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 1112516724361
166 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 1
167 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 25
168 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 44
169 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 753
170 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 0
171 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 0
172 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 0
173 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 18
174 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 57
184 End-to-End_Error 0x0032 100 100 --- Old_age
Always - 0
187 Reported_Uncorrect 0x0032 100 100 --- Old_age
Always - 0
188 Command_Timeout 0x0032 100 100 --- Old_age
Always - 1
194 Temperature_Celsius 0x0022 061 062 --- Old_age
Always - 39 (Min/Max 9/62)
199 UDMA_CRC_Error_Count 0x0032 100 100 --- Old_age
Always - 0
230 Unknown_SSD_Attribute 0x0032 100 100 --- Old_age
Always - 4733091251278
232 Available_Reservd_Space 0x0033 100 100 004 Pre-fail
Always - 100
233 Media_Wearout_Indicator 0x0032 100 100 --- Old_age
Always - 19202
234 Unknown_Attribute 0x0032 100 100 --- Old_age
Always - 32167
241 Total_LBAs_Written 0x0030 253 253 --- Old_age
Offline - 22520
242 Total_LBAs_Read 0x0030 253 253 --- Old_age
Offline - 183882
244 Unknown_Attribute 0x0032 000 100 --- Old_age
Always - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining
LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 7570 -
# 2 Extended offline Completed without error 00% 7395 -
# 3 Extended offline Completed without error 00% 6253 -
# 4 Short offline Completed without error 00% 4030 -
# 5 Extended offline Completed without error 00% 1568 -
# 6 Extended offline Completed without error 00% 1434 -
Selective Self-tests/Logging not supported
localhost:~ # btrfs fi usage /mnt
Overall:
Device size: 450.00GiB
Device allocated: 424.04GiB
Device unallocated: 25.96GiB
Device missing: 0.00B
Used: 420.38GiB
Free (estimated): 27.39GiB (min: 27.39GiB)
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 512.00MiB (used: 0.00B)
Data,single: Size:411.98GiB, Used:410.55GiB
/dev/sda12 411.98GiB
Metadata,single: Size:12.00GiB, Used:9.83GiB
/dev/sda12 12.00GiB
System,single: Size:64.00MiB, Used:64.00KiB
/dev/sda12 64.00MiB
Unallocated:
/dev/sda12 25.96GiB
The filesystem had become pretty full, I had planned to increase the
Btrfs-partition size before it became corrupt.
Active kernel when the filesystem went read only: OpenSUSE Linux
4.14.14-1.geef6178-default, from the
http://download.opensuse.org/repositories/Kernel:/stable/standard/stable
repository.
Fstab mount options: noatime,autodefrag (I have been using the option
nossd with older kernels one period in the past on the filesystem).
If it matters, I have been running duperemove many times on the
filesystem since creation.
To test the RAM, I have been running mprime Blend-test for 24 hours
after the corruption without any error or warning.
Is there a way I can try to repair this filesystem without the need to
recreate it and reinstall the operating system? A reinstall including
all currently installed packages, and restoring all current system
settings, would probably take some time for me to do.
If it is currently not repairable, it would be nice if this kind of
corruption could be repaired in the future, even if losing a few
files. Or if the corruptions could be avoided in the first place.
Laptop: Asus N56JR-S4075H, bought new 2014
Hard drive: since 14 months a SanDisk X400 SD8SB8U1T001122 1TB SSD,
originally a Seagate ST750LM000 SSHD
RAM: lshw:-memory
description: System Memory
physical id: c
slot: System board or motherboard
size: 12GiB
*-bank:0
description: SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)
product: ASU16D3LS1KBG/4G
vendor: Kingston
physical id: 0
serial: C32D5655
slot: ChannelA-DIMM0
size: 4GiB
width: 64 bits
clock: 1600MHz (0.6ns)
*-bank:1
description: DIMM [empty]
product: [Empty]
vendor: [Empty]
physical id: 1
serial: [Empty]
slot: ChannelA-DIMM1
*-bank:2
description: SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)
product: M471B1G73QH0-YK0
vendor: Samsung
physical id: 2
serial: 1519AD27
slot: ChannelB-DIMM0
size: 8GiB
width: 64 bits
clock: 1600MHz (0.6ns)
*-bank:3
description: DIMM [empty]
product: [Empty]
vendor: [Empty]
physical id: 3
serial: [Empty]
slot: ChannelB-DIMM1
CPU: Intel(R) Core(TM) i7-4700HQ CPU @ 2.40GHz
BIOS version: N56JRH.202
SSD Partitions (among others): Btrfs with OpenSUSE Tumbleweed
installation, NTFS with Windows 10, Ext4 with Fedora installation.
I have never noticed any corruptions on the NTFS and Ext4 file systems
on the laptop, only on the Btrfs file systems.
Best regards,
Claes Fransson
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