On Wednesday 01 March 2017 17:32:35 Qu Wenruo wrote: > At 03/01/2017 04:23 PM, Marc Joliet wrote: > > On Tuesday 28 February 2017 23:14:54 Marc Joliet wrote: > >> I think I'm at that point now myself, unless anybody has any other ideas. > > > > For example, could the --init-extent-tree option to btrfs-check help, > > given > > that I needed to pass -w to btrfs-image?
(First off, thanks for taking the time to respond!) > --init-extent-tree should be avoided normally, unless you're 100% sure > about only extent tree is corrupted, and you have enough faith that > --init-extent-tree can finish. > > Or it will mostly make things worse. OK, that's why I asked :) . > Before trying any RW btrfs check operations, did you run btrfs check on > the image? If by image you mean the device in question, not since the last time (see my previous messages). Or can I really run btrfs check on the image? In any case, I started btrfs-check on the device itself. > And btrfs check --mode=lowmem is also recommended as in some rare case, > low mem mode can detect bug which original mode doesn't. I did see differences in output the last time around (again, see my previous messages in this thread), so I'll run with lowmem. It won't be done until tomorrow, though. > (And it also helps us to enhance lowmem mode) OK > > Also, the image is complete, so I only need to find somewhere where I can > > upload a 9.4 GB file. > > Is it a compressed dump? Dumped with btrfs-image -c9? It was created with: btrfs-image -s -w /dev/sdb2 - | xz -9 --stdout > ./btrfs_backup_drive_2.img.xz (Mainly because I felt more comfortable using a separate compression utility, not for any rational reason. Although if you really meant "image" above, I have the feeling I'll regret this decision.) > If so, such large one won't help much unless there is some developer > really interested in inspecting the image. When I started without compression, it was something like 46 GB, after only 1-2 hours, so I expect the uncompressed size to be... very large :-/ . > Thanks, > Qu > > > Greetings > > -- > 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 Greetings -- Marc Joliet -- "People who think they know everything really annoy those of us who know we don't" - Bjarne Stroustrup
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