Here is btrfsck --repair, it took some time (500 GB, almost no files), and aborted. # ./btrfsck --repair /dev/vgCASRV0104/datasnap2 enabling repair mode checking extents corrupt extent record: key 314454016 168 524288 corrupt extent record: key 314978304 168 524288 corrupt extent record: key 315502592 168 524288 corrupt extent record: key 316026880 168 524288 corrupt extent record: key 316551168 168 524288 corrupt extent record: key 317075456 168 409600 corrupt extent record: key 317485056 168 372736 corrupt extent record: key 317857792 168 65536 corrupt extent record: key 317960192 168 1081344 ref mismatch on [289406976 36864] extent item 1, found 0 repair deleting extent record: key 289406976 168 36864 Incorrect local backref count on 289406976 root 257 owner 18446744073709551604 offset 0 found 0 wanted 1 back 0x10cbc30 backpointer mismatch on [289406976 36864] owner ref check failed [289406976 36864] ref mismatch on [289443840 36864] extent item 1, found 0 repair deleting extent record: key 289443840 168 36864 Incorrect local backref count on 289443840 root 259 owner 18446744073709551604 offset 0 found 0 wanted 1 back 0x10cbd10 backpointer mismatch on [289443840 36864] owner ref check failed [289443840 36864] ref mismatch on [304230400 262144] extent item 1, found 0 repair deleting extent record: key 304230400 168 262144 Incorrect local backref count on 304230400 root 259 owner 261 offset 262144 found 0 wanted 1 back 0x10cbdf0 backpointer mismatch on [304230400 262144] owner ref check failed [304230400 262144] ref mismatch on [304492544 524288] extent item 1, found 0 repair deleting extent record: key 304492544 168 524288 Incorrect local backref count on 304492544 root 259 owner 261 offset 524288 found 0 wanted 1 back 0x10cbed0 backpointer mismatch on [304492544 524288] owner ref check failed [304492544 524288] ref mismatch on [305016832 524288] extent item 1, found 0 repair deleting extent record: key 305016832 168 524288 Incorrect local backref count on 305016832 root 259 owner 261 offset 1048576 found 0 wanted 1 back 0x10cbfb0 backpointer mismatch on [305016832 524288] owner ref check failed [305016832 524288] ref mismatch on [305541120 524288] extent item 1, found 0 repair deleting extent record: key 305541120 168 524288 Incorrect local backref count on 305541120 root 259 owner 261 offset 1572864 found 0 wanted 1 back 0x10cc090 backpointer mismatch on [305541120 524288] owner ref check failed [305541120 524288] ref mismatch on [313929728 524288] extent item 65536, found 1 repair deleting extent record: key 313929728 168 524288 adding new data backref on 313929728 root 259 owner 261 offset 9961472 found 1 ref mismatch on [314454016 524288] extent item 65536, found 1 repair deleting extent record: key 314454016 168 524288 adding new data backref on 314454016 root 259 owner 261 offset 10485760 found 1 Backref 314454016 root 259 owner 261 offset 10485760 num_refs 0 not found in extent tree Incorrect local backref count on 314454016 root 259 owner 261 offset 10485760 found 1 wanted 0 back 0x10c7060 backpointer mismatch on [314454016 524288] ref mismatch on [314978304 524288] extent item 65536, found 1 repair deleting extent record: key 314978304 168 524288 adding new data backref on 314978304 root 259 owner 261 offset 11010048 found 1 Backref 314978304 root 259 owner 261 offset 11010048 num_refs 0 not found in extent tree Incorrect local backref count on 314978304 root 259 owner 261 offset 11010048 found 1 wanted 0 back 0x10c7140 backpointer mismatch on [314978304 524288] ref mismatch on [315502592 524288] extent item 281474976776192, found 1 repair deleting extent record: key 315502592 168 524288 adding new data backref on 315502592 root 259 owner 261 offset 11534336 found 1 Backref 315502592 root 259 owner 261 offset 11534336 num_refs 0 not found in extent tree Incorrect local backref count on 315502592 root 259 owner 261 offset 11534336 found 1 wanted 0 back 0x10c7220 backpointer mismatch on [315502592 524288] ref mismatch on [316026880 524288] extent item 4294967296, found 1 repair deleting extent record: key 316026880 168 524288 adding new data backref on 316026880 root 259 owner 261 offset 12058624 found 1 Backref 316026880 root 259 owner 261 offset 12058624 num_refs 0 not found in extent tree Incorrect local backref count on 316026880 root 259 owner 261 offset 12058624 found 1 wanted 0 back 0x10c7300 backpointer mismatch on [316026880 524288] ref mismatch on [316551168 524288] extent item 4294967296, found 1 repair deleting extent record: key 316551168 168 524288 adding new data backref on 316551168 root 259 owner 261 offset 12582912 found 1 Backref 316551168 root 259 owner 261 offset 12582912 num_refs 0 not found in extent tree Incorrect local backref count on 316551168 root 259 owner 261 offset 12582912 found 1 wanted 0 back 0x10c73e0 backpointer mismatch on [316551168 524288] ref mismatch on [317075456 409600] extent item 4294967297, found 1 repair deleting extent record: key 317075456 168 409600 adding new data backref on 317075456 root 259 owner 261 offset 13107200 found 1 Backref 317075456 root 259 owner 261 offset 13107200 num_refs 0 not found in extent tree Incorrect local backref count on 317075456 root 259 owner 261 offset 13107200 found 1 wanted 0 back 0x10c74c0 backpointer mismatch on [317075456 409600] ref mismatch on [317485056 372736] extent item 4294967296, found 1 repair deleting extent record: key 317485056 168 372736 adding new data backref on 317485056 root 259 owner 262 offset 0 found 1 Backref 317485056 root 259 owner 262 offset 0 num_refs 0 not found in extent tree Incorrect local backref count on 317485056 root 259 owner 262 offset 0 found 1 wanted 0 back 0x10c75a0 backpointer mismatch on [317485056 372736] ref mismatch on [317857792 65536] extent item 4294967296, found 1 repair deleting extent record: key 317857792 168 65536 adding new data backref on 317857792 root 1 owner 258 offset 0 found 1 Backref 317857792 root 1 owner 258 offset 0 num_refs 0 not found in extent tree Incorrect local backref count on 317857792 root 1 owner 258 offset 0 found 1 wanted 0 back 0x10cbb50 backpointer mismatch on [317857792 65536] ref mismatch on [317960192 1081344] extent item 4294967296, found 1 repair deleting extent record: key 317960192 168 1081344 adding new data backref on 317960192 root 259 owner 262 offset 368640 found 1 Backref 317960192 root 259 owner 262 offset 368640 num_refs 0 not found in extent tree Incorrect local backref count on 317960192 root 259 owner 262 offset 368640 found 1 wanted 0 back 0x10c7680 backpointer mismatch on [317960192 1081344] ref mismatch on [539897856 8796093022208] extent item 0, found 1 failed to repair damaged filesystem, aborting On Mon, Oct 22, 2012 at 11:40 AM, Jérôme Poulin <jeromepoulin@xxxxxxxxx> wrote: > Here is an excerpt of btrfsck: > ... -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info 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