On Tue, 4 Feb 2014 16:32:35 +0000 Hugo Mills <h...@carfax.org.uk> wrote:
> On Tue, Feb 04, 2014 at 10:23:10PM +0600, Roman Mamedov wrote:
> > Hello,
> >
> > My server had a period of instability (PSU-related issues), some lockups,
> > some strange crashes, and some files became corrupted, and perhaps parts of
> > a filesystem too. One BTRFS partition now fails with the following errors.
> >
> > On an attempt to make a snapshot:
> >
> > [ 48.035664] btrfs: corrupt leaf, bad key order:
> > block=193529446400,root=1, slot=9
> [snip]
>
> Bad key order is pretty much always down to hardware corrupting
> data at some point -- which would go well with your list of hardware
> problems above.
>
> > Currently I have it mounted read-only, and all data seems to be accessible.
> > Short of copying everything away and recreating the FS, how can I bring it
> > to
> > a working order. Is btrfsck a good option here?
>
> The first investigation to do would be to look at the block in
> question and see if it's got an obvious problem with it. If you post
> the output of "btrfs-debug-tree -b 193529446400 /dev/whatever", we can
> take a look at the indexing.
Thanks; here it is:
# btrfs-debug-tree -b 193529446400 /dev/md4
leaf 193529446400 items 81 free space 46 generation 565572 owner 7
fs uuid dd12de99-bbe5-45cf-b869-6313c1f58431
chunk uuid b61f845a-ada5-4bcf-b995-7c5e1affa63d
item 0 key (EXTENT_CSUM EXTENT_CSUM 4278808576) itemoff 3955 itemsize 40
extent csum item
item 1 key (EXTENT_CSUM EXTENT_CSUM 4278853632) itemoff 3895 itemsize 60
extent csum item
item 2 key (EXTENT_CSUM EXTENT_CSUM 4278919168) itemoff 3883 itemsize 12
extent csum item
item 3 key (EXTENT_CSUM EXTENT_CSUM 4278931456) itemoff 3843 itemsize 40
extent csum item
item 4 key (EXTENT_CSUM EXTENT_CSUM 4278976512) itemoff 3819 itemsize 24
extent csum item
item 5 key (EXTENT_CSUM EXTENT_CSUM 4279001088) itemoff 3815 itemsize 4
extent csum item
item 6 key (EXTENT_CSUM EXTENT_CSUM 4279005184) itemoff 3787 itemsize 28
extent csum item
item 7 key (EXTENT_CSUM EXTENT_CSUM 4279033856) itemoff 3715 itemsize 72
extent csum item
item 8 key (EXTENT_CSUM EXTENT_CSUM 4279107584) itemoff 3619 itemsize 96
extent csum item
item 9 key (EXTENT_CSUM EXTENT_CSUM 72998785024) itemoff 3599 itemsize
20
extent csum item
item 10 key (EXTENT_CSUM EXTENT_CSUM 4279345152) itemoff 3583 itemsize
16
extent csum item
item 11 key (EXTENT_CSUM EXTENT_CSUM 4279369728) itemoff 3575 itemsize 8
extent csum item
item 12 key (EXTENT_CSUM EXTENT_CSUM 4279463936) itemoff 3551 itemsize
24
extent csum item
item 13 key (EXTENT_CSUM EXTENT_CSUM 4279496704) itemoff 3523 itemsize
28
extent csum item
item 14 key (EXTENT_CSUM EXTENT_CSUM 4279525376) itemoff 3515 itemsize 8
extent csum item
item 15 key (EXTENT_CSUM EXTENT_CSUM 4279533568) itemoff 3511 itemsize 4
extent csum item
item 16 key (EXTENT_CSUM EXTENT_CSUM 4279537664) itemoff 3491 itemsize
20
extent csum item
item 17 key (EXTENT_CSUM EXTENT_CSUM 4279562240) itemoff 3463 itemsize
28
extent csum item
item 18 key (EXTENT_CSUM EXTENT_CSUM 4279607296) itemoff 3459 itemsize 4
extent csum item
item 19 key (EXTENT_CSUM EXTENT_CSUM 4279615488) itemoff 3403 itemsize
56
extent csum item
item 20 key (EXTENT_CSUM EXTENT_CSUM 4280020992) itemoff 3395 itemsize 8
extent csum item
item 21 key (EXTENT_CSUM EXTENT_CSUM 4280033280) itemoff 3391 itemsize 4
extent csum item
item 22 key (EXTENT_CSUM EXTENT_CSUM 4280053760) itemoff 3379 itemsize
12
extent csum item
item 23 key (EXTENT_CSUM EXTENT_CSUM 4280082432) itemoff 3331 itemsize
48
extent csum item
item 24 key (EXTENT_CSUM EXTENT_CSUM 4280135680) itemoff 3311 itemsize
20
extent csum item
item 25 key (EXTENT_CSUM EXTENT_CSUM 4280156160) itemoff 3299 itemsize
12
extent csum item
item 26 key (EXTENT_CSUM EXTENT_CSUM 4280168448) itemoff 3255 itemsize
44
extent csum item
item 27 key (EXTENT_CSUM EXTENT_CSUM 4280229888) itemoff 3243 itemsize
12
extent csum item
item 28 key (EXTENT_CSUM EXTENT_CSUM 4280262656) itemoff 3231 itemsize
12
extent csum item
item 29 key (EXTENT_CSUM EXTENT_CSUM 4280360960) itemoff 3223 itemsize 8
extent csum item
item 30 key (EXTENT_CSUM EXTENT_CSUM 4280369152) itemoff 3123 itemsize
100
extent csum item
item 31 key (EXTENT_CSUM EXTENT_CSUM 4280496128) itemoff 3115 itemsize 8
extent csum item
item 32 key (EXTENT_CSUM EXTENT_CSUM 4280504320) itemoff 3103 itemsize
12
extent csum item
item 33 key (EXTENT_CSUM EXTENT_CSUM 4280532992) itemoff 3087 itemsize
16
extent csum item
item 34 key (EXTENT_CSUM EXTENT_CSUM 4280549376) itemoff 3071 itemsize
16
extent csum item
item 35 key (EXTENT_CSUM EXTENT_CSUM 4280565760) itemoff 3063 itemsize 8
extent csum item
item 36 key (EXTENT_CSUM EXTENT_CSUM 4280573952) itemoff 3055 itemsize 8
extent csum item
item 37 key (EXTENT_CSUM EXTENT_CSUM 4280664064) itemoff 3047 itemsize 8
extent csum item
item 38 key (EXTENT_CSUM EXTENT_CSUM 4280672256) itemoff 3023 itemsize
24
extent csum item
item 39 key (EXTENT_CSUM EXTENT_CSUM 4280696832) itemoff 2967 itemsize
56
extent csum item
item 40 key (EXTENT_CSUM EXTENT_CSUM 4280762368) itemoff 2947 itemsize
20
extent csum item
item 41 key (EXTENT_CSUM EXTENT_CSUM 4280852480) itemoff 2939 itemsize 8
extent csum item
item 42 key (EXTENT_CSUM EXTENT_CSUM 4280868864) itemoff 2931 itemsize 8
extent csum item
item 43 key (EXTENT_CSUM EXTENT_CSUM 4280885248) itemoff 2915 itemsize
16
extent csum item
item 44 key (EXTENT_CSUM EXTENT_CSUM 4280905728) itemoff 2911 itemsize 4
extent csum item
item 45 key (EXTENT_CSUM EXTENT_CSUM 4280909824) itemoff 2895 itemsize
16
extent csum item
item 46 key (EXTENT_CSUM EXTENT_CSUM 4280971264) itemoff 2859 itemsize
36
extent csum item
item 47 key (EXTENT_CSUM EXTENT_CSUM 4281036800) itemoff 2823 itemsize
36
extent csum item
item 48 key (EXTENT_CSUM EXTENT_CSUM 4281102336) itemoff 2771 itemsize
52
extent csum item
item 49 key (EXTENT_CSUM EXTENT_CSUM 4281176064) itemoff 2759 itemsize
12
extent csum item
item 50 key (EXTENT_CSUM EXTENT_CSUM 4281188352) itemoff 2743 itemsize
16
extent csum item
item 51 key (EXTENT_CSUM EXTENT_CSUM 4281233408) itemoff 2735 itemsize 8
extent csum item
item 52 key (EXTENT_CSUM EXTENT_CSUM 4281323520) itemoff 2723 itemsize
12
extent csum item
item 53 key (EXTENT_CSUM EXTENT_CSUM 4281352192) itemoff 2711 itemsize
12
extent csum item
item 54 key (EXTENT_CSUM EXTENT_CSUM 4281364480) itemoff 2707 itemsize 4
extent csum item
item 55 key (EXTENT_CSUM EXTENT_CSUM 4281376768) itemoff 2667 itemsize
40
extent csum item
item 56 key (EXTENT_CSUM EXTENT_CSUM 4281417728) itemoff 2611 itemsize
56
extent csum item
item 57 key (EXTENT_CSUM EXTENT_CSUM 4281475072) itemoff 2591 itemsize
20
extent csum item
item 58 key (EXTENT_CSUM EXTENT_CSUM 4281495552) itemoff 2555 itemsize
36
extent csum item
item 59 key (EXTENT_CSUM EXTENT_CSUM 4281532416) itemoff 2551 itemsize 4
extent csum item
item 60 key (EXTENT_CSUM EXTENT_CSUM 4281561088) itemoff 2547 itemsize 4
extent csum item
item 61 key (EXTENT_CSUM EXTENT_CSUM 4281565184) itemoff 2527 itemsize
20
extent csum item
item 62 key (EXTENT_CSUM EXTENT_CSUM 4281602048) itemoff 2511 itemsize
16
extent csum item
item 63 key (EXTENT_CSUM EXTENT_CSUM 4281638912) itemoff 2503 itemsize 8
extent csum item
item 64 key (EXTENT_CSUM EXTENT_CSUM 4281876480) itemoff 2455 itemsize
48
extent csum item
item 65 key (EXTENT_CSUM EXTENT_CSUM 4281937920) itemoff 2431 itemsize
24
extent csum item
item 66 key (EXTENT_CSUM EXTENT_CSUM 4282073088) itemoff 2411 itemsize
20
extent csum item
item 67 key (EXTENT_CSUM EXTENT_CSUM 4282093568) itemoff 2395 itemsize
16
extent csum item
item 68 key (EXTENT_CSUM EXTENT_CSUM 4282109952) itemoff 2387 itemsize 8
extent csum item
item 69 key (EXTENT_CSUM EXTENT_CSUM 4282134528) itemoff 2335 itemsize
52
extent csum item
item 70 key (EXTENT_CSUM EXTENT_CSUM 4282191872) itemoff 2331 itemsize 4
extent csum item
item 71 key (EXTENT_CSUM EXTENT_CSUM 4282216448) itemoff 2255 itemsize
76
extent csum item
item 72 key (EXTENT_CSUM EXTENT_CSUM 4282298368) itemoff 2251 itemsize 4
extent csum item
item 73 key (EXTENT_CSUM EXTENT_CSUM 4282503168) itemoff 2223 itemsize
28
extent csum item
item 74 key (EXTENT_CSUM EXTENT_CSUM 4282531840) itemoff 2211 itemsize
12
extent csum item
item 75 key (EXTENT_CSUM EXTENT_CSUM 4282548224) itemoff 2151 itemsize
60
extent csum item
item 76 key (EXTENT_CSUM EXTENT_CSUM 4282626048) itemoff 2123 itemsize
28
extent csum item
item 77 key (EXTENT_CSUM EXTENT_CSUM 4282658816) itemoff 2119 itemsize 4
extent csum item
item 78 key (EXTENT_CSUM EXTENT_CSUM 4282662912) itemoff 2107 itemsize
12
extent csum item
item 79 key (EXTENT_CSUM EXTENT_CSUM 4282679296) itemoff 2095 itemsize
12
extent csum item
item 80 key (EXTENT_CSUM EXTENT_CSUM 4282712064) itemoff 2071 itemsize
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extent csum item
--
With respect,
Roman
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