From: Timo Nentwig <btrfs@nentwig.biz>
To: linux-btrfs@vger.kernel.org
Subject: Re: can't read superblock (but could mount)
Date: Tue, 14 Feb 2012 18:37:16 +0100 (CET) [thread overview]
Message-ID: <alpine.LNX.2.00.1202141832420.11051@localhost> (raw)
In-Reply-To: <20120213130943.GA1573@shiny>
On Mon, 13 Feb 2012, Chris Mason wrote:
> btrfs-debug-tree -b 9872289792 /dev/xxx
# btrfs-debug-tree -b 9872289792 /dev/loop1
leaf 9872289792 items 51 free space 0 generation 120351 owner 5
fs uuid 9e9886fc-3e60-4c59-a246-727662769ee2
chunk uuid f7e4ac1e-f4d6-436b-9bda-8409311dcdb6
item 0 key (923514 DIR_ITEM 2120090750) itemoff 3950 itemsize 45
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namelen 23 datalen 0 name: lubR10-ISO8859-2.pcf.gz
item 12 key (923514 DIR_ITEM 2136302367) itemoff 3298 itemsize 55
location key (2721978 INODE_ITEM 0) type 1
namelen 25 datalen 0 name: helvR14-ISO8859-15.pcf.gz
item 13 key (923514 DIR_ITEM 2141157400) itemoff 3244 itemsize 54
location key (2721809 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: luRS24-ISO8859-10.pcf.gz
item 14 key (923514 DIR_ITEM 2143920500) itemoff 3190 itemsize 54
location key (2722139 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: lutRS10-ISO8859-4.pcf.gz
item 15 key (923514 DIR_ITEM 2145353946) itemoff 3137 itemsize 53
location key (2722006 INODE_ITEM 0) type 1
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item 17 key (923514 DIR_ITEM 2153679091) itemoff 3026 itemsize 56
location key (2722231 INODE_ITEM 0) type 1
namelen 26 datalen 0 name: UTB___12-ISO8859-10.pcf.gz
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location key (2721854 INODE_ITEM 0) type 1
namelen 25 datalen 0 name: UTRG__24-ISO8859-3.pcf.gz
item 19 key (923514 DIR_ITEM 2164008501) itemoff 2917 itemsize 54
location key (2723441 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: lubR14-ISO8859-13.pcf.gz
item 20 key (923514 DIR_ITEM 2164058590) itemoff 2872 itemsize 45
location key (2722030 INODE_ITEM 0) type 1
namelen 15 datalen 0 name: courBO18.pcf.gz
item 21 key (923514 DIR_ITEM 2164312387) itemoff 2827 itemsize 45
location key (2722107 INODE_ITEM 0) type 1
namelen 15 datalen 0 name: ncenBI12.pcf.gz
item 22 key (923514 DIR_ITEM 2166794582) itemoff 2773 itemsize 54
location key (2722054 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: timB08-ISO8859-10.pcf.gz
item 23 key (923514 DIR_ITEM 2168622352) itemoff 2718 itemsize 55
location key (2722318 INODE_ITEM 0) type 1
namelen 25 datalen 0 name: courB18-ISO8859-14.pcf.gz
item 24 key (923514 DIR_ITEM 2175186950) itemoff 2664 itemsize 54
location key (2722350 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: lubBI24-ISO8859-1.pcf.gz
item 25 key (923514 DIR_ITEM 2176060521) itemoff 2609 itemsize 55
location key (2722198 INODE_ITEM 0) type 1
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item 38 key (923514 DIR_ITEM 2199518165) itemoff 1925 itemsize 55
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namelen 25 datalen 0 name: luBIS12-ISO8859-14.pcf.gz
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location key (2723152 INODE_ITEM 0) type 1
namelen 23 datalen 0 name: timR08-ISO8859-1.pcf.gz
item 46 key (923514 DIR_ITEM 2234719731) itemoff 1492 itemsize 54
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namelen 24 datalen 0 name: luBIS08-ISO8859-9.pcf.gz
item 47 key (923514 DIR_ITEM 2235808109) itemoff 1438 itemsize 54
location key (2723080 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: timI24-ISO8859-14.pcf.gz
item 48 key (923514 DIR_ITEM 2235875207) itemoff 1383 itemsize 55
location key (2723463 INODE_ITEM 0) type 1
namelen 25 datalen 0 name: ncenB08-ISO8859-13.pcf.gz
item 49 key (923514 DIR_ITEM 2236228503) itemoff 1329 itemsize 54
location key (2721755 INODE_ITEM 0) type 1
namelen 24 datalen 0 name: ncenI10-ISO8859-3.pcf.gz
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# btrfsck /dev/loop1
Extent back ref already exists for 9872289792 parent 0 root 5
leaf parent key incorrect 9872289792
bad block 9872289792
ref mismatch on [9872289792 4096] extent item 1, found 2
Incorrect global backref count on 9872289792 found 1 wanted 2
backpointer mismatch on [9872289792 4096]
owner ref check failed [9872289792 4096]
ref mismatch on [9889067008 4096] extent item 1, found 0
Backref 9889067008 root 5 not referenced
Incorrect global backref count on 9889067008 found 1 wanted 0
backpointer mismatch on [9889067008 4096]
owner ref check failed [9889067008 4096]
ref mismatch on [37163102208 65536] extent item 1, found 0
Incorrect local backref count on 37163102208 root 5 owner 3360937 offset 0 found
0 wanted 1
backpointer mismatch on [37163102208 65536]
owner ref check failed [37163102208 65536]
ref mismatch on [37163814912 36864] extent item 0, found 1
Backref 37163814912 root 5 owner 3360939 offset 0 num_refs 0 not found in extent
tree
Incorrect local backref count on 37163814912 root 5 owner 3360939 offset 0 found
1 wanted 0
backpointer mismatch on [37163814912 36864]
found 15491117056 bytes used err is 1
total csum bytes: 14764500
total tree bytes: 366956544
total fs tree bytes: 317714432
btree space waste bytes: 90628933
file data blocks allocated: 16182484992
referenced 17813028864
Btrfs Btrfs v0.19
# mount /dev/loop1 /tmp/b
mount: block device /dev/loop1 is write-protected, mounting read-only
# ls /tmp/b
bin boot dev etc home lib lib64 media mnt opt proc root run sbin
srv sys tmp usr var vm
# echo "hooray!"
Please explain :)
next prev parent reply other threads:[~2012-02-14 17:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-10 19:30 can't read superblock (but could mount) btrfs
2012-02-10 22:18 ` Chris Mason
2012-02-10 23:39 ` Chris Mason
2012-02-11 6:27 ` btrfs
2012-02-13 13:09 ` Chris Mason
2012-02-14 17:37 ` Timo Nentwig [this message]
2012-02-14 18:41 ` Chris Mason
2012-02-14 18:54 ` Timo Nentwig
2012-02-14 21:14 ` Chris Mason
2012-02-15 6:03 ` Timo Nentwig
2012-02-15 13:23 ` Chris Mason
2012-02-16 17:04 ` Timo Nentwig
2012-02-16 18:14 ` Chris Mason
2012-02-17 3:35 ` Timo Nentwig
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