From: Alfred Zastrow <ml@zastrow4u.de>
To: linux-btrfs@vger.kernel.org
Subject: BTRFS filesystem is not mountable after crash
Date: Mon, 20 Aug 2012 23:42:46 +0200 [thread overview]
Message-ID: <k0ub0m$pvp$1@ger.gmane.org> (raw)
Hi devs,
I've a serious problem with my 160 gb SSD which is not mountable
anymore. A backup for most of the date is there, but not for the latest
ones. :-(
The crash occurred during a download (system hangs totaly, hard reset)
with a Fedora 3.5.2 linux kernel. The btrfs partition was working quite
good for about one year.
here is a try to attach the device and mount manually:
-----------------------------------------------------
[ 3123.582387] sd 1:0:0:0: Attached scsi generic sg2 type 0
[ 3123.582833] sdb: sdb1
[ 3123.583085] sd 1:0:0:0: [sdb] Attached SCSI disk
[ 3169.789800] Btrfs loaded
[ 3169.791156] device fsid 4d00f0e6-e9d7-42d9-8514-827d8f01f7d3 devid 1
transid 192331 /dev/sdb1
[ 3169.796334] btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt
16, gen 0
[ 3169.840296] Btrfs detected SSD devices, enabling SSD mode
[ 3169.841541] btrfs bad tree block start 0 29450240
[ 3169.841545] btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt
17, gen 0
[ 3169.841605] btrfs bad tree block start 0 29450240
[ 3169.841609] btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt
18, gen 0
[ 3123.582387] sd 1:0:0:0: Attached scsi generic sg2 type 0
[ 3123.582833] sdb: sdb1
[ 3123.583085] sd 1:0:0:0: [sdb] Attached SCSI disk
[ 3169.789800] Btrfs loaded
[ 3169.791156] device fsid 4d00f0e6-e9d7-42d9-8514-827d8f01f7d3 devid 1
transid 192331 /dev/sdb1
[ 3169.796334] btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt
16, gen 0
[ 3169.840296] Btrfs detected SSD devices, enabling SSD mode
[ 3169.841541] btrfs bad tree block start 0 29450240
[ 3169.841545] btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt
17, gen 0
[ 3169.841605] btrfs bad tree block start 0 29450240
[ 3169.841609] btrfs: bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt
18, gen 0
the latest btrfs-restore from Chris' GIT (same result with Josefs restore
----------------------------------
[root@z2 btrfs-progs-chris]# ./btrfs-restore -i /dev/sdb1 /mnt
Root objectid is 5
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
read block failed check_tree_block
Error searching -5
btrfsck (latest from Chris) shows a lot of these mismatches and crashes
at the end :-(
-----------------------------------------------------------
[...]
backpointer mismatch on [152106881024 12288]
owner ref check failed [152106881024 12288]
ref mismatch on [152106893312 12288] extent item 1, found 0
Incorrect local backref count on 152106893312 root 5 owner 267 offset
34226176 found 0 wanted 1 back 0x57024e0
backpointer mismatch on [152106893312 12288]
owner ref check failed [152106893312 12288]
ref mismatch on [152106905600 12288] extent item 1, found 0
Incorrect local backref count on 152106905600 root 5 owner 267 offset
34623488 found 0 wanted 1 back 0x57025c0
backpointer mismatch on [152106905600 12288]
owner ref check failed [152106905600 12288]
ref mismatch on [152106917888 12288] extent item 1, found 0
Incorrect local backref count on 152106917888 root 5 owner 267 offset
34672640 found 0 wanted 1 back 0x57026a0
backpointer mismatch on [152106917888 12288]
owner ref check failed [152106917888 12288]
ref mismatch on [152106930176 16384] extent item 1, found 0
Incorrect local backref count on 152106930176 root 5 owner 267 offset
34734080 found 0 wanted 1 back 0x5702780
backpointer mismatch on [152106930176 16384]
owner ref check failed [152106930176 16384]
ref mismatch on [152106946560 24576] extent item 1, found 0
Incorrect local backref count on 152106946560 root 5 owner 267 offset
36159488 found 0 wanted 1 back 0x5702860
backpointer mismatch on [152106946560 24576]
owner ref check failed [152106946560 24576]
ref mismatch on [152106971136 28672] extent item 1, found 0
Incorrect local backref count on 152106971136 root 5 owner 267 offset
37212160 found 0 wanted 1 back 0x5702940
backpointer mismatch on [152106971136 28672]
owner ref check failed [152106971136 28672]
ref mismatch on [152106999808 12288] extent item 1, found 0
Incorrect local backref count on 152106999808 root 5 owner 267 offset
37679104 found 0 wanted 1 back 0x5702a20
backpointer mismatch on [152106999808 12288]
owner ref check failed [152106999808 12288]
ref mismatch on [152107012096 8192] extent item 1, found 0
Incorrect local backref count on 152107012096 root 5 owner 267 offset
37707776 found 0 wanted 1 back 0x5702b00
backpointer mismatch on [152107012096 8192]
owner ref check failed [152107012096 8192]
ref mismatch on [152107020288 36864] extent item 1, found 0
Incorrect local backref count on 152107020288 root 5 owner 267 offset
37777408 found 0 wanted 1 back 0x5702be0
backpointer mismatch on [152107020288 36864]
owner ref check failed [152107020288 36864]
ref mismatch on [152107057152 24576] extent item 1, found 0
Incorrect local backref count on 152107057152 root 5 owner 267 offset
38776832 found 0 wanted 1 back 0x5702cc0
backpointer mismatch on [152107057152 24576]
owner ref check failed [152107057152 24576]
ref mismatch on [152107081728 8192] extent item 1, found 0
Incorrect local backref count on 152107081728 root 5 owner 267 offset
39444480 found 0 wanted 1 back 0x5702da0
backpointer mismatch on [152107081728 8192]
owner ref check failed [152107081728 8192]
ref mismatch on [152107089920 16384] extent item 1, found 0
Incorrect local backref count on 152107089920 root 5 owner 267 offset
39817216 found 0 wanted 1 back 0x5702e80
backpointer mismatch on [152107089920 16384]
owner ref check failed [152107089920 16384]
ref mismatch on [152107126784 12288] extent item 1, found 0
Incorrect local backref count on 152107126784 root 5 owner 267 offset
41345024 found 0 wanted 1 back 0x5702f60
backpointer mismatch on [152107126784 12288]
owner ref check failed [152107126784 12288]
ref mismatch on [152107139072 4096] extent item 1, found 0
Incorrect local backref count on 152107139072 root 5 owner 267 offset
41631744 found 0 wanted 1 back 0x5706510
backpointer mismatch on [152107139072 4096]
owner ref check failed [152107139072 4096]
ref mismatch on [152107241472 49152] extent item 1, found 0
Incorrect local backref count on 152107241472 root 5 owner 267 offset
44765184 found 0 wanted 1 back 0x57065f0
backpointer mismatch on [152107241472 49152]
owner ref check failed [152107241472 49152]
Errors found in extent allocation tree
checking fs roots
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
read block failed check_tree_block
Speicherzugriffsfehler (Speicherabzug geschrieben)
find-root from Joseph:
-----------------------
[root@z2 btrfs-progs-josef]# ./find-root /dev/sdb1
Super think's the tree root is at 32030720, chunk root 20971520
Generation: 192331 Root bytenr: 29446144 Root objectid: 2
Generation: 192331 Root bytenr: 32464896 Root objectid: 4
Generation: 192331 Root bytenr: 29360128 Root objectid: 5
Generation: 192331 Root bytenr: 29581312 Root objectid: 7
Generation: 192331 Root bytenr: 29380608 Root objectid: 18446744073709551607
Well block 29437952 seems great, but generation doesn't match,
have=192331, want=192333
Generation: 192332 Root bytenr: 30793728 Root objectid: 2
Generation: 192332 Root bytenr: 31121408 Root objectid: 4
Generation: 192332 Root bytenr: 29360128 Root objectid: 5
Generation: 192332 Root bytenr: 29581312 Root objectid: 7
Generation: 192332 Root bytenr: 29380608 Root objectid: 18446744073709551607
Well block 30732288 seems great, but generation doesn't match,
have=192332, want=192333
Generation: 192333 Root bytenr: 32432128 Root objectid: 2
Generation: 192333 Root bytenr: 31121408 Root objectid: 4
Generation: 192333 Root bytenr: 29360128 Root objectid: 5
Generation: 192333 Root bytenr: 29581312 Root objectid: 7
Generation: 192333 Root bytenr: 29380608 Root objectid: 18446744073709551607
Found tree root at 32030720
debug-tree shows the same problematic block on the console, the
generated list is written up to the end without crash
-------------------------------------------
[root@z2 btrfs-progs-chris]# ./btrfs-debug-tree /dev/sdb1 >123
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
Check tree block failed, want=29450240, have=0
read block failed check_tree_block
failed to read 29450240 in tree 5
[...]
310797516/296M 100%
item 0 key (EXTENT_CSUM EXTENT_CSUM 156340977664) itemoff 563
itemsize 3432
extent csum item
leaf 75816960 items 2 free space 2081 generation 190286 owner 7
fs uuid 4d00f0e6-e9d7-42d9-8514-827d8f01f7d3
chunk uuid 7e64d936-3686-4e79-890e-aa9a090eb95d
item 0 key (EXTENT_CSUM EXTENT_CSUM 156344492032) itemoff 2643
itemsize 1352
extent csum item
item 1 key (EXTENT_CSUM EXTENT_CSUM 156345876480) itemoff 2131
itemsize 512
extent csum item
leaf 75796480 items 1 free space 178 generation 190286 owner 7
fs uuid 4d00f0e6-e9d7-42d9-8514-827d8f01f7d3
chunk uuid 7e64d936-3686-4e79-890e-aa9a090eb95d
item 0 key (EXTENT_CSUM EXTENT_CSUM 156346400768) itemoff 203
itemsize 3792
extent csum item
data reloc tree key (DATA_RELOC_TREE ROOT_ITEM 0)
leaf 29380608 items 2 free space 3773 generation 5 owner
18446744073709551607
fs uuid 4d00f0e6-e9d7-42d9-8514-827d8f01f7d3
chunk uuid 7e64d936-3686-4e79-890e-aa9a090eb95d
item 0 key (256 INODE_ITEM 0) itemoff 3835 itemsize 160
inode generation 4 transid 0 size 0 block group 0 mode
40555 links 1
item 1 key (256 INODE_REF 256) itemoff 3823 itemsize 12
inode ref index 0 namelen 2 name: ..
total bytes 160039960576
bytes used 103460102144
uuid 4d00f0e6-e9d7-42d9-8514-827d8f01f7d3
Btrfs Btrfs v0.19
Is there any hope for me?
best regards
Alfred
next reply other threads:[~2012-08-20 21:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-20 21:42 Alfred Zastrow [this message]
2012-08-26 5:27 ` BTRFS filesystem is not mountable after crash Alfred Zastrow
2012-08-26 6:17 ` Liu Bo
2012-10-13 17:51 ` Alfred Zastrow
2012-10-13 22:56 ` cwillu
2012-10-14 15:48 ` Alfred Zastrow
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