Re: Unable to mount degraded RAID5

On Mon, Jul 11, 2016 at 11:17 AM, Tomáš Hrdina wrote: > sudo btrfs-debug-tree /dev/sdc > It has 20 lines. Don't know, what you use for bigger files. > > > sudo btrfs-debug-tree -b 6062434418688 /dev/sdc >

Re: Unable to mount degraded RAID5

up and just start fresh. Thank you Tomas *From:* Chris Murphy *Sent:* Sunday, July 10, 2016 10:08PM *To:* Tomáš Hrdina *Cc:* Chris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded RAID5 btrfs-debug-tree -b

Re: Unable to mount degraded RAID5

On Sun, Jul 10, 2016 at 1:01 AM, Tomáš Hrdina wrote: > sudo btrfs check --repair /dev/sdc > enabling repair mode > parent transid verify failed on 7008807157760 wanted 70175 found 70133 > parent transid verify failed on 7008807157760 wanted 70175 found 70133 > checksum

Re: Unable to mount degraded RAID5

ris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded RAID5 btrfs check --repair --- Tato zpráva byla zkontrolována na viry programem Avast Antivirus. https://www.avast.com/antivirus -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a mess

Re: Unable to mount degraded RAID5

On Sat, Jul 9, 2016 at 11:30 AM, Tomáš Hrdina wrote: > sudo btrfs rescue super-recover -v /dev/sda > All Devices: > Device: id = 1, name = /dev/sdc > Device: id = 2, name = /dev/sdb > Device: id = 3, name = /dev/sda > > Before Recovering: >

Re: Unable to mount degraded RAID5

nk you for help... Tomas *From:* Chris Murphy *Sent:* Wednesday, July 06, 2016 8:12PM *To:* Tomáš Hrdina *Cc:* Chris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded RAID5 btrfs rescue super-recover -v /d

Re: Unable to mount degraded RAID5

Thanks a lot, your will to help out someone you do not know (and who is obviously way over his depth) is inspiring. This is what it says: btrfs rescue super-recover -v /dev/sdc1 All Devices: Device: id = 3, name = /dev/sdd1 Device: id = 1, name = /dev/sdc1 Before Recovering: [All good supers]:

Re: Unable to mount degraded RAID5

On Wed, Jul 6, 2016 at 11:12 AM, Gonzalo Gomez-Arrue Azpiazu wrote: > Hello, > > I had a RAID5 with 3 disks and one failed; now the filesystem cannot be > mounted. > > None of the recommendations that I found seem to work. The situation > seems to be similar to this one: >

Re: Unable to mount degraded RAID5

On Wed, Jul 6, 2016 at 11:50 AM, Tomáš Hrdina wrote: > sudo mount -o ro /dev/sdc /shares > mount: wrong fs type, bad option, bad superblock on /dev/sdc, >missing codepage or helper program, or other error > >In some cases useful info is found in syslog - try

Re: Unable to mount degraded RAID5

(7.0 seconds) Write: 70 (7.0 seconds) Thank you Tomas *From:* Chris Murphy *Sent:* Wednesday, July 06, 2016 6:08PM *To:* Tomáš Hrdina *Cc:* Chris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded

Fwd: Unable to mount degraded RAID5

Hello, I had a RAID5 with 3 disks and one failed; now the filesystem cannot be mounted. None of the recommendations that I found seem to work. The situation seems to be similar to this one: http://www.spinics.net/lists/linux-btrfs/msg56825.html Any suggestion on what to try next? Thanks a lot

Re: Unable to mount degraded RAID5

On Wed, Jul 6, 2016 at 2:07 AM, Tomáš Hrdina wrote: > Now with 3 disks: > > sudo btrfs check /dev/sda > parent transid verify failed on 7008807157760 wanted 70175 found 70133 > parent transid verify failed on 7008807157760 wanted 70175 found 70133 > checksum verify failed on

Re: Unable to mount degraded RAID5

:19AM *To:* Tomáš Hrdina *Cc:* Chris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded RAID5 btrfs check --- Tato zpráva byla zkontrolována na viry programem Avast Antivirus. https://www.avast.com/antivirus -- To unsubscribe from this list: send the line "unsubscribe linux-

Re: Unable to mount degraded RAID5

On Tue, Jul 5, 2016 at 12:40 PM, Tomáš Hrdina wrote: > I don't know, if it would be good idea, but my disk, which disconnected > is connected again. Maybe it could help in getting data to the right > state, so other two disk could be mounted alone. But don't know, if it >

Re: Unable to mount degraded RAID5

Tomas *From:* Chris Murphy *Sent:* Tuesday, July 05, 2016 5:13PM *To:* Andrei Borzenkov *Cc:* Chris Murphy, Tomáš Hrdina, Btrfs Btrfs *Subject:* Re: Unable to mount degraded RAID5 On Mon, Jul 4, 2016 at 9:48 PM, Andrei

Re: Unable to mount degraded RAID5

On Mon, Jul 4, 2016 at 9:48 PM, Andrei Borzenkov wrote: > 04.07.2016 23:43, Chris Murphy пишет: >> >> Have you done a scrub on this file system and do you know if anything >> was fixed or if it always found no problem? >> > > scrub on degraded RAID5 cannot fix anything by

Re: Unable to mount degraded RAID5

read chunk tree ERROR: unable to open /dev/sdc Thank you Tomas *From:* Chris Murphy *Sent:* Tuesday, July 05, 2016 12:42AM *To:* Tomáš Hrdina *Cc:* Chris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded

Re: Unable to mount degraded RAID5

04.07.2016 23:43, Chris Murphy пишет: > > Have you done a scrub on this file system and do you know if anything > was fixed or if it always found no problem? > scrub on degraded RAID5 cannot fix anything by definition, because even if scrub finds discrepancies, it does not have enough data to

Re: Unable to mount degraded RAID5

I just tried btrfs rescue chunk-recover (btrfs-progs 4.6) on new Btrfs, 3x raid5 with 1 dev missing. I get: [root@f24s ~]# btrfs rescue chunk-recover /dev/VG/2 Scanning: DONE in dev0, DONE in dev1 open with broken chunk error Chunk tree recovery failed So I don't think rescue chunk-recover can

Re: Unable to mount degraded RAID5

On Mon, Jul 4, 2016 at 3:10 PM, Tomáš Hrdina wrote: > http://sebsauvage.net/paste/?39c73a3440b2e903#WZnUJXNFPNz/fFuOK3QquVeOWQUopcCl0JabtuYMWew= Both backup 0 and 1 have bad information for backup_fs_root. backup_fs_root: 0 gen: 0 level: 0 Presumably it automatically

Re: Unable to mount degraded RAID5

*From:* Chris Murphy *Sent:* Monday, July 04, 2016 10:43PM *To:* Tomáš Hrdina *Cc:* Chris Murphy, Btrfs Btrfs *Subject:* Re: Unable to mount degraded RAID5 On Mon, Jul 4, 2016 at 1:11 PM, Tomáš Hrdina <thomas@gmail.com>

Re: Unable to mount degraded RAID5

On Mon, Jul 4, 2016 at 1:11 PM, Tomáš Hrdina wrote: > Result from dmesg: > http://sebsauvage.net/paste/?4e8e95b5eafbf675#ybToBzZ/WAoRjjugeH6N2YXZKEBlswaNI/J41GBmFYU= [10849.041749] BTRFS info (device sda): allowing degraded mounts [10849.041754] BTRFS info (device sda):

Re: Unable to mount degraded RAID5

ksum verify failed on 12678831570944 found 3DC57E3E wanted 771D2379 bytenr mismatch, want=12678831570944, have=10160133442474442752 Couldn't read chunk tree Couldn't open file system Thank you Tomas ---- *From:* Chris Murphy *Sent:* Monday, July 04, 2016 9:01PM *To:* Tomáš Hrdina, Btrfs

Re: Unable to mount degraded RAID5

On Mon, Jul 4, 2016 at 12:54 PM, Tomáš Hrdina wrote: > Degraded gives same result: > > sudo mount -t btrfs -o ro,degraded /dev/sda /shares > mount: wrong fs type, bad option, bad superblock on /dev/sda, >missing codepage or helper program, or other error > >

Re: Unable to mount degraded RAID5

On Mon, Jul 4, 2016 at 12:09 PM, Tomáš Hrdina wrote: > sudo mount -t btrfs -o ro,recovery /dev/sdc /shares > mount: wrong fs type, bad option, bad superblock on /dev/sdc, >missing codepage or helper program, or other error > >In some cases useful info is

Unable to mount degraded RAID5

Hello, one of my 3 disks failed in RAID5. After that, fs is unable to mount. Any help on what to try next would be appreciated. sudo btrfs version btrfs-progs v4.6.1 -- I installed 4.6.1 just now. I ran rescue on 4.4 uname -a Linux uncik-srv 4.4.0-24-generic #43-Ubuntu SMP Wed Jun 8 19:27:37