lostmeeee
n00b
Joined: 13 Feb 2025
Posts: 1
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 Posted: Thu Feb 13, 2025 6:20 pm Post subject: Sudden BTRFS failure |
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Hello, this is my first post in the Gentoo Forums.
A few days ago, a power outage happened while I had a btrfs partition mounted. My computer shut off, and I only came to use that partition again today. However, when trying to mount, even specifying the type of the partition, the following is found:
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# mount -t btrfs -o compress-force=zstd /dev/mapper/s1 /mnt/ssd
mount: /mnt/ssd: can't read superblock on /dev/mapper/s1.
dmesg(1) may have more information after failed mount system call.
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Dmesg:
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BTRFS error (device dm-2): bad tree block start, mirror 1 want 23642112 have 11738718632178979669
BTRFS error (device dm-2): bad tree block start, mirror 2 want 23642112 have 9946923798501279660
BTRFS error (device dm-2): failed to read chunk tree: -5
BTRFS error (device dm-2): open_ctree failed
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We can see that those start bytes are ridiculous.
Other partitions in the same hardware device are still working. No data lost.
By the way, the btrfs is encrypted with luks2.
I ran smartctl long as well, however the attempts are being shown in the log as
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# 1 Extended offline Aborted by host 00% 1851
# 2 Extended offline Aborted by host 00% 1849
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What worries me the most: the amount of Unknown_Attribute:
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SMART Attributes Data Structure revision number: 20
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0013 100 100 050 Pre-fail Always - 0
9 Power_On_Hours 0x0012 100 100 000 Old_age Always - 1852
12 Power_Cycle_Count 0x0012 100 100 000 Old_age Always - 185
167 Unknown_Attribute 0x0022 100 100 000 Old_age Always - 0
168 Unknown_Attribute 0x0012 100 100 000 Old_age Always - 4844723109888
169 Unknown_Attribute 0x0013 100 100 010 Pre-fail Always - 327690
171 Unknown_Attribute 0x0032 000 000 000 Old_age Always - 0
172 Unknown_Attribute 0x0032 000 000 000 Old_age Always - 0
173 Unknown_Attribute 0x0012 200 200 000 Old_age Always - 12888702996
175 Program_Fail_Count_Chip 0x0022 100 100 010 Old_age Always - 0
177 Wear_Leveling_Count 0x0012 100 100 000 Old_age Always - 247800667
180 Unused_Rsvd_Blk_Cnt_Tot 0x0033 100 100 000 Pre-fail Always - 199
187 Reported_Uncorrect 0x0032 100 000 000 Old_age Always - 0
192 Power-Off_Retract_Count 0x0012 100 100 000 Old_age Always - 151
194 Temperature_Celsius 0x0022 056 056 000 Old_age Always - 56 (Min/Max 34/64)
196 Reallocated_Event_Count 0x0012 100 100 000 Old_age Always - 0
199 UDMA_CRC_Error_Count 0x0012 100 100 000 Old_age Always - 0
206 Unknown_SSD_Attribute 0x0032 200 200 000 Old_age Always - 3
207 Unknown_SSD_Attribute 0x0032 200 200 000 Old_age Always - 58
208 Unknown_SSD_Attribute 0x0032 200 200 000 Old_age Always - 20
209 Unknown_SSD_Attribute 0x0032 200 200 000 Old_age Always - 1
210 Unknown_Attribute 0x0032 200 200 000 Old_age Always - 320
211 Unknown_Attribute 0x0032 200 200 000 Old_age Always - 159
231 Unknown_SSD_Attribute 0x0023 099 099 005 Pre-fail Always - 1
241 Total_LBAs_Written 0x0032 100 100 000 Old_age Always - 1718
242 Total_LBAs_Read 0x0032 100 100 000 Old_age Always - 1093
245 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 30920407201763
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When running btrfs check:
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btrfs check /dev/mapper/s1
Opening filesystem to check...
checksum verify failed on 23642112 wanted 0xc3ba9f06 found 0x62fcfc3c
checksum verify failed on 23642112 wanted 0x2d6a18d7 found 0x63d2c823
checksum verify failed on 23642112 wanted 0xc3ba9f06 found 0x62fcfc3c
bad tree block 23642112, bytenr mismatch, want=23642112, have=11738718632178979669
Couldn't read chunk tree
ERROR: cannot open file system
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With --repair, the same happens.
Interestingly:
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# btrfs rescue chunk-recover /dev/mapper/s1
Scanning: 60784640 in dev0Segmentation fault
# btrfs rescue super-recover /dev/mapper/s1
All supers are valid, no need to recover
# btrfs restore -D /dev/mapper/s1 /tmp/
checksum verify failed on 23642112 wanted 0xc3ba9f06 found 0x62fcfc3c
checksum verify failed on 23642112 wanted 0x2d6a18d7 found 0x63d2c823
checksum verify failed on 23642112 wanted 0xc3ba9f06 found 0x62fcfc3c
bad tree block 23642112, bytenr mismatch, want=23642112, have=11738718632178979669
Couldn't read chunk tree
Could not open root, trying backup super
checksum verify failed on 23642112 wanted 0xc3ba9f06 found 0x62fcfc3c
checksum verify failed on 23642112 wanted 0x2d6a18d7 found 0x63d2c823
checksum verify failed on 23642112 wanted 0xc3ba9f06 found 0x62fcfc3c
bad tree block 23642112, bytenr mismatch, want=23642112, have=11738718632178979669
Couldn't read chunk tree
Could not open root, trying backup super
ERROR: superblock bytenr 274877906944 is larger than device size 214731587584
Could not open root, trying backup super
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I searched online but could not find anything about it. What gets me is that the other partitions are still working.
Thanks in advance. |
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Kernel & Hardware
