Re: Recovery options for damaged beginning of the filesystem

2018-10-10 Thread Chris Murphy
On Tue, Oct 9, 2018 at 10:47 PM, Shapranov Vladimir wrote: > Hi, > > I've got a filesystem with first ~50Mb accidentally dd'ed. > > "btrfs check" fails with a following error (regardless of "-s"): > checksum verify failed on 21037056 found FC8A6557 wanted 2F51D090 > checksum verify failed on

Re: Recovery options for damaged beginning of the filesystem

2018-10-10 Thread Qu Wenruo
On 2018/10/10 下午12:47, Shapranov Vladimir wrote: > Hi, > > I've got a filesystem with first ~50Mb accidentally dd'ed. So about 49M meta/data loss. It depends on the chunk layout. If it got one metadata chunk wiped out, it's pretty hard to repair. If it only wiped several data chunks, it

Recovery options for damaged beginning of the filesystem

2018-10-09 Thread Shapranov Vladimir
Hi, I've got a filesystem with first ~50Mb accidentally dd'ed. "btrfs check" fails with a following error (regardless of "-s"): checksum verify failed on 21037056 found FC8A6557 wanted 2F51D090 checksum verify failed on 21037056 found FC8A6557 wanted 2F51D090 checksum verify failed on 21037056