On 8/22/19 12:32 AM, Qu Wenruo wrote: >>> Then I'd recommend to do regular rescue procedure: >>> - Try that skip_bg patchset if possible >>> This provides the best salvage method so far, full subvolume >>> available, although needs out-of-tree patches. >>> https://patchwork.kernel.org/project/linux-btrfs/list/?series=130637 >>> >> >> I can give that a go, but not for a while. >> >> I seem to be able to read the file system as is, as it goes read only. >> But perhaps 'seems' is the operative word. > > As long as you can mount RO, it shouldn't be mostly OK for data salvage. > Posting this for completeness, as this started just before I went away for a while. The filesystem was RO but there were failures copying affected files meaning my copy from the RO file system was incomplete. So I likely _should_ have applied the patch suggested above, if that was my only copy. Instead I recovered from backups. Thanks for your help. Pete
