Urgent: Need BTRFS-Expert

Urgent: Need BTRFS-Expert

[Michael Post]

Hello together,

i need a BTRFS-Expert for remote support.

Anyone who can assist me?

Please let me know,

Michael Post

Urgent: Need BTRFS-Expert

[Michael Post]

Hello together,

i need a BTRFS-Expert for remote support.

Anyone who can assist me via Skype or teamviewer?
I will pay for it.

Please let me know,

Michael Post

Re: Urgent: Need BTRFS-Expert

[Hugo Mills]

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   Hi, Michael,

On Wed, Oct 17, 2018 at 09:58:31AM +0200, Michael Post wrote:
> Hello together,
> 
> i need a BTRFS-Expert for remote support.
> 
> Anyone who can assist me?

   This is generally the wrong approach to take in open-source
circles. Instead, if you describe your problem here on this mailing
list, you'll get *most* of the experts looking at it, rather than just
the one, and you'll generally get a much better (and easier to use)
service.

   Hugo.

-- 
Hugo Mills             | The early bird gets the worm, but the second mouse
hugo@... carfax.org.uk | gets the cheese.
http://carfax.org.uk/  |
PGP: E2AB1DE4          |

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Re: Urgent: Need BTRFS-Expert

[Michael Post]

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Hello Hugo,

thanks for your information.

I have an 1 TB BTRFS-Partition which suddenly could not be mounted.

I tried the following commands


host@:btrfs check -b /dev/mapper/vg0-virtualbox
....
Errors found in extent allocation tree or chunk allocation
bytenr mismatch, want=1263661723648, have=0




host@:btrfs rescue super-recover -y  /dev/mapper/vg0-virtualbox
All supers are valid, no need to recover


Then i did
btrfs rescue chunk-recover -y  /dev/mapper/vg0-virtualbox
This commands fails after around 2.5 hours with the messages, that it
could not recover the chunc tree.

What are the next possibilities?

Greetings,

Michael


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Re: Urgent: Need BTRFS-Expert

[Qu Wenruo]

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On 2018/10/17 下午5:27, Michael Post wrote:
> Hello Hugo,
> 
> thanks for your information.
> 
> I have an 1 TB BTRFS-Partition which suddenly could not be mounted.
> 
> I tried the following commands
> 
> 
> host@:btrfs check -b /dev/mapper/vg0-virtualbox
> ....

This is the important part.
Please paste them out.

Thanks,
Qu

> Errors found in extent allocation tree or chunk allocation
> bytenr mismatch, want=1263661723648, have=0
> 
> 
> 
> 
> host@:btrfs rescue super-recover -y  /dev/mapper/vg0-virtualbox
> All supers are valid, no need to recover
> 
> 
> Then i did
> btrfs rescue chunk-recover -y  /dev/mapper/vg0-virtualbox
> This commands fails after around 2.5 hours with the messages, that it
> could not recover the chunc tree.
> 
> What are the next possibilities?
> 
> Greetings,
> 
> Michael
> 


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Re: Urgent: Need BTRFS-Expert

[Michael Post]

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Hello Qu,
Hello Hugo,

i got this result when i try to recover the chunk tree.

# btrfs check /dev/mapper/vg0-virtualbox
bytenr mismatch, want=1263835381760, have=0
ERROR: cannot open file system


# btrfs rescue chunk-recover -y  /dev/mapper/vg0-virtualbox
Scanning: DONE in dev0
open with broken chunk error
Chunk tree recovery failed

Did you any clue?


Michael


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Re: Urgent: Need BTRFS-Expert

[Qu Wenruo]

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On 2018/10/17 下午11:50, Michael Post wrote:
> Hello Qu,
> Hello Hugo,
> 
> i got this result when i try to recover the chunk tree.
> 
> # btrfs check /dev/mapper/vg0-virtualbox
> bytenr mismatch, want=1263835381760, have=0
> ERROR: cannot open file system

This means some essential trees get corrupted.
I remember latest btrfs-progs should prompt which tree is corrupted.

Would you please use latest btrfs-progs and try again?

Also would you please paste the following output?

 # btrfs ins dump-super <device>
 # btrfs ins dump-tree -t chunk <device>

Thanks,
Qu

> 
> 
> # btrfs rescue chunk-recover -y  /dev/mapper/vg0-virtualbox
> Scanning: DONE in dev0
> open with broken chunk error
> Chunk tree recovery failed
> 
> Did you any clue?
> 
> 
> Michael
> 


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