Re: Check tree block failed, want=17716610236416, have=0

[Zygo Blaxell <ce3g8jdj@umail.furryterror.org>]

[-- Attachment #1: Type: text/plain, Size: 872 bytes --]

On Thu, Oct 23, 2014 at 09:24:48PM -0400, Zygo Blaxell wrote:
> On Thu, Oct 23, 2014 at 05:28:58PM -0700, Robert White wrote:
> > You may be in deep error land from the long use of 3.10... that
> > said, the --init-csum-tree or --init-extent-tree options may be your
> > friend here. The backtrace shows you are in "open_ctree" so the
> > former is more likely the better bet.

Alas, both fail:

	# btrfs check --repair --init-csum-tree --init-extent-tree /dev/mapper/md15
	enabling repair mode
	Creating a new CRC tree
	Couldn't open file system

Same result with each option individually, except that when
--init-csum-tree is absent, so is the "Creating a new CRC tree" message.

I'm also trying 'btrfs rescue chunk-recover -v' but so far it has read
many gigabytes but not had much to say.

(LVM snapshots + kvm = attack this filesystem with multiple tools at once :-)

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 198 bytes --]