Scotty Edmonds wrote on 2015/11/13 03:05 +0000:
Got this:
[root@rockstor ~]# btrfs-show-super -f /dev/sdg
superblock: bytenr=65536, device=/dev/sdg
---------------------------------------------------------
csum 0x793978ef [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid e8c92d93-fac3-4f83-b3aa-31cb92caafd9
label mainNAS
generation 25209
root 8640557629440
sys_array_size 225
chunk_root_generation 25196
root_level 1
chunk_root 12060305932288
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 15002964910080
bytes_used 5973553180672
sectorsize 4096
nodesize 16384
leafsize 16384
stripesize 4096
root_dir 6
num_devices 5
compat_flags 0x0
compat_ro_flags 0x0
incompat_flags 0x1e1
( MIXED_BACKREF |
BIG_METADATA |
EXTENDED_IREF |
RAID56 |
SKINNY_METADATA )
csum_type 0
csum_size 4
cache_generation 25209
uuid_tree_generation 25209
dev_item.uuid 286474b1-210d-4db1-b97f-ff07116bf2f9
dev_item.fsid e8c92d93-fac3-4f83-b3aa-31cb92caafd9 [match]
dev_item.type 0
dev_item.total_bytes 3000592982016
dev_item.bytes_used 1497618186240
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
sys_chunk_array[2048]:
item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 12060305915904)
chunk length 67108864 owner 2 stripe_len 65536
type SYSTEM|RAID5 num_stripes 5
stripe 0 devid 4 offset 1074790400
stripe 1 devid 5 offset 1074790400
stripe 2 devid 1 offset 1371537408
stripe 3 devid 3 offset 1351614464
stripe 4 devid 2 offset 1351614464
backup_roots[4]:
backup 0:
backup_tree_root: 8640557629440 gen: 25209 level:
1
backup_chunk_root: 12060305932288 gen: 25196 level:
1
backup_extent_root: 8640865320960 gen: 25209 level:
2
backup_fs_root: 6680017420288 gen: 25128 level: 0
backup_dev_root: 7742127030272 gen: 25196 level:
1
backup_csum_root: 8640864288768 gen: 25209 level:
3
backup_total_bytes: 15002964910080
backup_bytes_used: 5973553180672
backup_num_devices: 5
backup 1:
backup_tree_root: 7742772379648 gen: 25206 level:
1
backup_chunk_root: 12060305932288 gen: 25196 level:
1
backup_extent_root: 7742740856832 gen: 25206 level:
2
backup_fs_root: 6680017420288 gen: 25128 level: 0
backup_dev_root: 7742127030272 gen: 25196 level:
1
backup_csum_root: 7742662393856 gen: 25206 level:
3
backup_total_bytes: 15002964910080
backup_bytes_used: 5972952920064
backup_num_devices: 5
backup 2:
backup_tree_root: 7742732894208 gen: 25207 level:
1
backup_chunk_root: 12060305932288 gen: 25196 level:
1
backup_extent_root: 7742674255872 gen: 25207 level:
2
backup_fs_root: 6680017420288 gen: 25128 level: 0
backup_dev_root: 7742127030272 gen: 25196 level:
1
backup_csum_root: 7742665457664 gen: 25207 level:
3
backup_total_bytes: 15002964910080
backup_bytes_used: 5973141712896
backup_num_devices: 5
backup 3:
backup_tree_root: 8640836403200 gen: 25208 level:
1
backup_chunk_root: 12060305932288 gen: 25196 level:
1
backup_extent_root: 8640865320960 gen: 25209 level:
2
backup_fs_root: 6680017420288 gen: 25128 level: 0
backup_dev_root: 7742127030272 gen: 25196 level:
1
backup_csum_root: 8640864288768 gen: 25209 level:
3
backup_total_bytes: 15002964910080
backup_bytes_used: 5973372186624
backup_num_devices: 5
No good clue, as no backup roots records a old chunk_root.
But we have a good enough superblock sys_chunk_array.
At least can use it to do chunk root scan.
But the patch will need some time.
Thanks,
Qu
[root@rockstor ~]#
Thanks,
Scotty Edmonds
sco...@scottyedmonds.com
________________________________________
From: Qu Wenruo <quwen...@cn.fujitsu.com>
Sent: November-12-15 11:00 PM
To: Scotty Edmonds; Hugo Mills; Donald Pearson
Cc: Btrfs BTRFS
Subject: Re: BTRFS Error - Rockstor
Although I submitted a patch, that won't work for you.
As I found that your whole chunk tree is corrupted, so I'll need to add
a new mode for you to handle such case, which will be much time
consuming than the patch I submitted...
But your superblock should has some glue if we are in good luck.
Would you please paste the output of 'btrfs-show-super -f <device>'?
If we are in good luck, it has something like:
------
backup 0:
backup_tree_root: 30932992 gen: 10 level: 0
backup_chunk_root: 20971520 gen: 9 level: 0
backup_extent_root: 30916608 gen: 10 level: 0
backup_fs_root: 30982144 gen: 10 level: 0
backup_dev_root: 29458432 gen: 8 level: 0
backup_csum_root: 30949376 gen: 10 level: 1
backup_total_bytes: 1073741824
backup_bytes_used: 949682176
backup_num_devices: 1
backup 1:
backup_tree_root: 30998528 gen: 11 level: 0
backup_chunk_root: 20971520 gen: 8 level: 0
backup_extent_root: 31014912 gen: 11 level: 0
backup_fs_root: 30982144 gen: 10 level: 0
backup_dev_root: 29458432 gen: 8 level: 0
backup_csum_root: 30949376 gen: 10 level: 1
backup_total_bytes: 1073741824
backup_bytes_used: 949682176
backup_num_devices: 1
------
And if the back_chunk_root's gen is smaller than
'chunk_root_generation', you're in good luck and can use that chunk root
to give it a try.
Thanks,
Qu
Scotty Edmonds wrote on 2015/11/13 02:23 +0000:
yes, no problem. I had it powered off as I'm moving the system to a proper
chassis and won't have it for another two weeks.
Thanks,
Scotty Edmonds
sco...@scottyedmonds.com
________________________________________
From: Qu Wenruo <quwen...@cn.fujitsu.com>
Sent: November-12-15 10:21 PM
To: Scotty Edmonds; Hugo Mills; Donald Pearson
Cc: Btrfs BTRFS
Subject: Re: BTRFS Error - Rockstor
Chunk root seems corrupted.
But that's not a really huge problem, tree root corruption happens, and
thanks to the full CoW of btrfs metadata, we will always be able to find
a old version one.
I'd like to do a full disk scan for any earlier version chunk root, but
I found that btrfs-find-root doesn't support search for chunk root.
(Hey, who is the bad ass wrote btrfs-find-root and made chunk root
search unsupported?! Oh, that's myself)
If you can wait, I'll add chunk root search support for you in recent
days, and then hopes we can find something helpful.
Thanks,
Qu
Scotty Edmonds wrote on 2015/11/13 01:46 +0000:
Thanks for the help, I got the same error on all variants.
[root@rockstor ~]# btrfs check --readonly -s 0 /dev/sdh
using SB copy 0, bytenr 65536
checksum verify failed on 12060305965056 found 779CCA23 wanted A746C37A
checksum verify failed on 12060305965056 found 779CCA23 wanted A746C37A
checksum verify failed on 12060305965056 found 1727A198 wanted 231E1577
checksum verify failed on 12060305965056 found 1727A198 wanted 231E1577
bytenr mismatch, want=12060305965056, have=13820656527619066643
Couldn't read chunk tree
Couldn't open file system
[root@rockstor ~]#
Thanks,
Scotty Edmonds
sco...@scottyedmonds.com
________________________________________
From: Hugo Mills <h...@carfax.org.uk>
Sent: November-12-15 6:57 PM
To: Donald Pearson
Cc: Scotty Edmonds; Btrfs BTRFS
Subject: Re: BTRFS Error - Rockstor
On IRC earlier, I asked for the btrfs-debug-tree output of the
broken tree block (1205030...etc). Since it's also failing, that would
kind of indicate that this is pretty badly broken for some reason.
It doesn't quite feel like a broken disk to me, but I'm not sure
what _has_ happened. Looks like something has stomped on a piece of
metadata fairly high up in the data structures.
It probably won't show anything different, but could you do
$ btrfs check --readonly -s $N /dev/$D
for values of $N from 0 to 3, and for all the devices $D? I'm
expecting to see the same errors (except for -s3, which is probably
out of range), but if by any chance you get something different, that
may give us a way into recovery.
Hugo.
On Thu, Nov 12, 2015 at 04:41:58PM -0600, Donald Pearson wrote:
On Thu, Nov 12, 2015 at 4:24 PM, Scotty Edmonds
<sco...@scottyedmonds.com> wrote:
Not exactly sure what to look for in dmesg.. If it is a disk fail shouldn't I
just be able to remove the disk as it's RAID5?
Yes theoretically.
[ 20.323997] BTRFS: device label seagate3x2tb devid 2 transid 2315 /dev/sdc
[ 20.324387] BTRFS: device label seagate3x2tb devid 1 transid 2315 /dev/sda
[ 20.324601] BTRFS: device label seagate3x2tb devid 3 transid 2315 /dev/sdd
[ 20.324698] BTRFS: device label mainNAS devid 1 transid 25209 /dev/sdg
[ 20.324794] BTRFS: device label mainNAS devid 2 transid 25209 /dev/sdf
[ 20.324938] BTRFS: device label mainNAS devid 5 transid 25209 /dev/sde
[ 20.325124] BTRFS: device label mainNAS devid 4 transid 25209 /dev/sdb
[ 20.325256] BTRFS: device label mainNAS devid 3 transid 25209 /dev/sdh
[ 105.285746] BTRFS info (device sdh): disk space caching is enabled
[ 105.285753] BTRFS: has skinny extents
[ 105.756545] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 105.758877] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 105.759154] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 105.759340] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 105.759417] BTRFS: failed to read chunk tree on sdh
[ 105.774774] BTRFS: open_ctree failed
[ 127.736060] BTRFS info (device sdd): disk space caching is enabled
[ 127.736066] BTRFS: has skinny extents
[ 141.887422] BTRFS info (device sdh): disk space caching is enabled
[ 141.887428] BTRFS: has skinny extents
[ 141.899666] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 141.902385] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 141.902639] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 141.902795] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[ 141.902870] BTRFS: failed to read chunk tree on sdh
[ 141.915337] BTRFS: open_ctree failed
[17748.031552] BTRFS info (device sdh): disk space caching is enabled
[17748.031559] BTRFS: has skinny extents
[17748.072339] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17748.077023] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17748.077350] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17748.077511] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17748.077587] BTRFS: failed to read chunk tree on sdh
[17748.088908] BTRFS: open_ctree failed
[17800.758291] BTRFS info (device sdh): disk space caching is enabled
[17800.758298] BTRFS: has skinny extents
[17800.765770] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17800.768816] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17800.769054] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17800.769192] BTRFS (device sdh): bad tree block start 13820666663704185619
12060305965056
[17800.769264] BTRFS: failed to read chunk tree on sdh
[17800.784937] BTRFS: open_ctree failed
[root@rockstor ~]#
and then I get this:
[root@rockstor ~]# btrfs-debug-tree -b 12060305965056 /dev/sdh
checksum verify failed on 12060305965056 found 779CCA23 wanted A746C37A
checksum verify failed on 12060305965056 found 779CCA23 wanted A746C37A
checksum verify failed on 12060305965056 found 1727A198 wanted 231E1577
checksum verify failed on 12060305965056 found 1727A198 wanted 231E1577
bytenr mismatch, want=12060305965056, have=13820656527619066643
Couldn't read chunk tree
unable to open /dev/sdh
[root@rockstor ~]#
Thanks,
Scotty Edmonds
sco...@scottyedmonds.com
I think we need to see what some of the more experienced users think
on this one. But you can try removing sdh and seeing if you can mount
it *read only* and degraded. Just make sure whatever you do and play
with is done read only. Don't try any fixes or repairs with the tools
unless told to do so by someone who really knows what they're talking
about.
________________________________________
From: Donald Pearson <donaldwhpear...@gmail.com>
Sent: November-12-15 6:19 PM
To: Scotty Edmonds; Btrfs BTRFS
Subject: Re: BTRFS Error - Rockstor
Anything interesting in dmesg?
That looks similar to the kind of problems I had when I had a disk fail.
On Thu, Nov 12, 2015 at 4:08 PM, Scotty Edmonds
<sco...@scottyedmonds.com> wrote:
I get this:
[root@rockstor ~]# btrfs check /dev/sdd
checksum verify failed on 12060305965056 found 779CCA23 wanted A746C37A
checksum verify failed on 12060305965056 found 779CCA23 wanted A746C37A
checksum verify failed on 12060305965056 found 1727A198 wanted 231E1577
checksum verify failed on 12060305965056 found 1727A198 wanted 231E1577
bytenr mismatch, want=12060305965056, have=13820656527619066643
Couldn't read chunk tree
Couldn't open file system
[root@rockstor ~]#
Thanks,
Scotty Edmonds
sco...@scottyedmonds.com
________________________________________
From: Donald Pearson <donaldwhpear...@gmail.com>
Sent: November-12-15 2:55 PM
To: Scotty Edmonds
Cc: linux-btrfs@vger.kernel.org
Subject: Re: BTRFS Error - Rockstor
What does btrfs check without any repair options report?
btrfs check /dev/sdd
On Thu, Nov 12, 2015 at 12:48 PM, Scotty Edmonds
<sco...@scottyedmonds.com> wrote:
Rockstor was running great, I ordered a SuperMicro 24-bay Chassis and decided to power down the machine
while I was away. When I turned it back on I got "Failed to read chunk tree" &
"open_ctree failed" error (http://i.imgur.com/rGk9M57l.jpg)
I spoke with support at Rockstor and they recommended I seek help via the
mailing list. Here are some details and commands I've run. The specific array
is in RAID5 and the label is mainNAS, seagate3x2tb is running perfectly.
[root@rockstor ~]# btrfs device scan
Scanning for Btrfs filesystems
[root@rockstor ~]#
[root@rockstor ~]# /usr/bin/lsblk -P -o
NAME,MODEL,SERIAL,SIZE,TRAN,VENDOR,HCTL,TYPE,FSTYPE,LABEL,UUID
NAME="sda" MODEL="WDC WD30EFRX-68E" SERIAL="WD-WCC4N4KVC39Y" SIZE="2.7T" TRAN="sas" VENDOR="ATA " HCTL="0:0:0:0"
TYPE="disk" FSTYPE="btrfs" LABEL="mainNAS" UUID="e8c92d93-fac3-4f83-b3aa-31cb92caafd9"
NAME="sdb" MODEL="WDC WD30EZRX-00M" SERIAL="WD-WCAWZ2551761" SIZE="2.7T" TRAN="sas" VENDOR="ATA " HCTL="0:0:1:0"
TYPE="disk" FSTYPE="btrfs" LABEL="mainNAS" UUID="e8c92d93-fac3-4f83-b3aa-31cb92caafd9"
NAME="sdc" MODEL="HGST HDN724030AL" SERIAL="PK2234P9J590GY" SIZE="2.7T" TRAN="sas" VENDOR="ATA " HCTL="0:0:2:0"
TYPE="disk" FSTYPE="btrfs" LABEL="mainNAS" UUID="e8c92d93-fac3-4f83-b3aa-31cb92caafd9"
NAME="sdd" MODEL="HGST HDN724030AL" SERIAL="PK2234P9J5WA1Y" SIZE="2.7T" TRAN="sas" VENDOR="ATA " HCTL="0:0:3:0"
TYPE="disk" FSTYPE="btrfs" LABEL="mainNAS" UUID="e8c92d93-fac3-4f83-b3aa-31cb92caafd9"
NAME="sde" MODEL="ST3000DM001-1CH1" SERIAL="Z1F517PH" SIZE="2.7T" TRAN="sas" VENDOR="ATA " HCTL="0:0:4:0"
TYPE="disk" FSTYPE="btrfs" LABEL="mainNAS" UUID="e8c92d93-fac3-4f83-b3aa-31cb92caafd9"
NAME="sdf" MODEL="ST2000DL003-9VT1" SERIAL="5YD1WK0V" SIZE="1.8T" TRAN="sas" VENDOR="ATA " HCTL="0:0:5:0"
TYPE="disk" FSTYPE="btrfs" LABEL="seagate3x2tb" UUID="6ef19043-2d83-4ff1-b959-b9f3c425cc69"
NAME="sdg" MODEL="ST2000DL003-9VT1" SERIAL="5YD2EBDA" SIZE="1.8T" TRAN="sas" VENDOR="ATA " HCTL="0:0:6:0"
TYPE="disk" FSTYPE="btrfs" LABEL="seagate3x2tb" UUID="6ef19043-2d83-4ff1-b959-b9f3c425cc69"
NAME="sdh" MODEL="ST2000DL003-9VT1" SERIAL="5YD2L28Z" SIZE="1.8T" TRAN="sas" VENDOR="ATA " HCTL="0:0:7:0"
TYPE="disk" FSTYPE="btrfs" LABEL="seagate3x2tb" UUID="6ef19043-2d83-4ff1-b959-b9f3c425cc69"
NAME="sdi" MODEL="INTEL SSDSA2CW08" SERIAL="CVPR1330019Y080BGN" SIZE="74.5G" TRAN="sata" VENDOR="ATA "
HCTL="1:0:0:0" TYPE="disk" FSTYPE="" LABEL="" UUID=""
NAME="sdi1" MODEL="" SERIAL="" SIZE="500M" TRAN="" VENDOR="" HCTL="" TYPE="part" FSTYPE="ext4"
LABEL="" UUID="53aabf2f-5e28-4a18-922f-b0767a77a8ec"
NAME="sdi2" MODEL="" SERIAL="" SIZE="7.3G" TRAN="" VENDOR="" HCTL="" TYPE="part" FSTYPE="swap"
LABEL="" UUID="bf9e72c7-7d72-4a33-a5eb-0a0013033234"
NAME="sdi3" MODEL="" SERIAL="" SIZE="66.8G" TRAN="" VENDOR="" HCTL="" TYPE="part" FSTYPE="btrfs"
LABEL="rockstor_rockstor" UUID="3533171e-d95b-4491-aa4c-cc956536a1c3"
[root@rockstor ~]#
[root@rockstor ~]# btrfs fi show
Label: 'rockstor_rockstor' uuid: 3533171e-d95b-4491-aa4c-cc956536a1c3
Total devices 1 FS bytes used 2.17GiB
devid 1 size 66.79GiB used 7.02GiB path /dev/sdi3
Label: 'seagate3x2tb' uuid: 6ef19043-2d83-4ff1-b959-b9f3c425cc69
Total devices 3 FS bytes used 1.13TiB
devid 1 size 1.82TiB used 595.03GiB path /dev/sdh
devid 2 size 1.82TiB used 595.01GiB path /dev/sdf
devid 3 size 1.82TiB used 595.01GiB path /dev/sdg
Label: 'mainNAS' uuid: e8c92d93-fac3-4f83-b3aa-31cb92caafd9
Total devices 5 FS bytes used 5.43TiB
devid 1 size 2.73TiB used 1.36TiB path /dev/sdd
devid 2 size 2.73TiB used 1.36TiB path /dev/sdc
devid 3 size 2.73TiB used 1.36TiB path /dev/sda
devid 4 size 2.73TiB used 1.36TiB path /dev/sde
devid 5 size 2.73TiB used 1.36TiB path /dev/sdb
btrfs-progs v4.2.1
I'm unable to mount any of the drives that are in the mainNAS array, this is
the error when I try to mount all of the drives degraded.
[root@rockstor ~]# mount -v -o degraded /dev/sdd /mnt2/mainNAS
mount: wrong fs type, bad option, bad superblock on /dev/sdd,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
[root@rockstor ~]#
I haven't given up hope yet as the "btrfs fi show" gives me all the correct
data and I ran chunk-recover and superblocks all report back as good.
Thanks for your help, let me know if you need any further information.
Thanks,
Scotty Edmonds
sco...@scottyedmonds.com
--
Hugo Mills | "How deep will this sub go?"
hugo@... carfax.org.uk | "Oh, she'll go all the way to the bottom if we don't
http://carfax.org.uk/ | stop her."
PGP: E2AB1DE4 | U571
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