Re: Recovering from btrfs error Couldn't read chunk root.
Hello, Unrecoverable? I know i cant mount and have access but my data are still there intact ( as i was using them till the reboot) i shouldn't be able to extract/recover them to another disc? With any magic command without mounting? Any other solutions? As We Know chunk Tree really plays a vital role in btrfs filesystem, And it seems your chunk Tree is totally damaged, And it is ok to recover chunk tree if block groups are ok, Unfortunately, dd seems to destroy some of them. Maybe you can refers to commands btrfs-restore's help, i guess it doesn't work either. Thank, Wang http://bpaste.net/show/118112/ On 29 July 2013 15:06, Wang Shilong wangshilong1...@gmail.com wrote: 在 2013-7-29，上午2:12，Kyriakos kyriakosbrastia...@gmail.com 写道： Just tried it as you said with the -v option enabled This is my output: http://bpaste.net/show/118112/ This is a *long* email, and seems that btrfs list refuse it. Device extent: devid = 1, start = 1667558801408, len = 1073741824, chunk offset = 1663255445504 Couldn't map the block 626309926912 btrfs: volumes.c:1020: btrfs_num_copies: Assertion `!(ce-start logical || ce-start + ce-size logical)' failed. Aborted (core dumped) Strange enough, we don't find any chunks during scanning process. And seems this is unrecoverable ~_~ Wang, Any thoughts? On 28 July 2013 08:17, Wang Shilong wangshilong1...@gmail.com wrote: Hello, It seems Btrfs Chunk Tree is damaged, so you can not mount Btrfs filesystem any more. However, you can try the latest Btrfs-progs, Miao Xie implements chunk tree recover function. The url is: git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git you can try it: btrfs chunk-recover -v dev This is Time-consuming, because it will scan the whole disk. And also, please catch output of processing(this is helpful to us if the recovery fails, -v option enable this). Thanks, Wang -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Recovering from btrfs error Couldn't read chunk root.
在 2013-7-29，上午2:12，Kyriakos kyriakosbrastia...@gmail.com 写道： Just tried it as you said with the -v option enabled This is my output: http://bpaste.net/show/118112/ This is a *long* email, and seems that btrfs list refuse it. Device extent: devid = 1, start = 1667558801408, len = 1073741824, chunk offset = 1663255445504 Couldn't map the block 626309926912 btrfs: volumes.c:1020: btrfs_num_copies: Assertion `!(ce-start logical || ce-start + ce-size logical)' failed. Aborted (core dumped) Strange enough, we don't find any chunks during scanning process. And seems this is unrecoverable ~_~ Wang, Any thoughts? On 28 July 2013 08:17, Wang Shilong wangshilong1...@gmail.com wrote: Hello, It seems Btrfs Chunk Tree is damaged, so you can not mount Btrfs filesystem any more. However, you can try the latest Btrfs-progs, Miao Xie implements chunk tree recover function. The url is: git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git you can try it: btrfs chunk-recover -v dev This is Time-consuming, because it will scan the whole disk. And also, please catch output of processing(this is helpful to us if the recovery fails, -v option enable this). Thanks, Wang -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Recovering from btrfs error Couldn't read chunk root.
Unrecoverable? I know i cant mount and have access but my data are still there intact ( as i was using them till the reboot) i shouldn't be able to extract/recover them to another disc? With any magic command without mounting? Any other solutions? http://bpaste.net/show/118112/ On 29 July 2013 15:06, Wang Shilong wangshilong1...@gmail.com wrote: 在 2013-7-29，上午2:12，Kyriakos kyriakosbrastia...@gmail.com 写道： Just tried it as you said with the -v option enabled This is my output: http://bpaste.net/show/118112/ This is a *long* email, and seems that btrfs list refuse it. Device extent: devid = 1, start = 1667558801408, len = 1073741824, chunk offset = 1663255445504 Couldn't map the block 626309926912 btrfs: volumes.c:1020: btrfs_num_copies: Assertion `!(ce-start logical || ce-start + ce-size logical)' failed. Aborted (core dumped) Strange enough, we don't find any chunks during scanning process. And seems this is unrecoverable ~_~ Wang, Any thoughts? On 28 July 2013 08:17, Wang Shilong wangshilong1...@gmail.com wrote: Hello, It seems Btrfs Chunk Tree is damaged, so you can not mount Btrfs filesystem any more. However, you can try the latest Btrfs-progs, Miao Xie implements chunk tree recover function. The url is: git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git you can try it: btrfs chunk-recover -v dev This is Time-consuming, because it will scan the whole disk. And also, please catch output of processing(this is helpful to us if the recovery fails, -v option enable this). Thanks, Wang -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Recovering from btrfs error Couldn't read chunk root.
Hello, It seems Btrfs Chunk Tree is damaged, so you can not mount Btrfs filesystem any more. However, you can try the latest Btrfs-progs, Miao Xie implements chunk tree recover function. The url is: git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git you can try it: btrfs chunk-recover -v dev This is Time-consuming, because it will scan the whole disk. And also, please catch output of processing(this is helpful to us if the recovery fails, -v option enable this). Thanks, Wang -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
