On Sat, Sep 05, 2015 at 12:13:30PM +0200, Ivan Petrovic wrote: > I don't know... but after btrfs-zero-log now I can't: > > ivan@ipplus-dev:~$ sudo btrfs filesystem df /dev/sdb > [sudo] password for ivan: > ERROR: couldn't get space info - Inappropriate ioctl for device > ERROR: get_df failed Inappropriate ioctl for device > ivan@ipplus-dev:~$
You can only use this command while the FS is mounted, and you can't give it a device, only a mountpoint. Also, note that btrfs-zero-log won't help you at all here. It's not a magic "fix everything for me" tool. > So you're saying that I can't make first and third partition to work > with it's data? Maybe I'll try with btrfs-restore, do you think it can > rescue this 2 drives? Unlikely. Like I said, if the FS was using single storage for everything, a random 33% of the filesystem has gone away. There's probably not enough of it left to make anything coherent. Hugo. > Thanks > > 2015-09-04 23:17 GMT+02:00 Hugo Mills <h...@carfax.org.uk>: > > On Fri, Sep 04, 2015 at 09:07:34PM +0000, Ivan wrote: > >> > >> Just to add this: > >> > >> ivan@ipplus-dev:~$ sudo btrfs filesystem df /mnt/ambis/ > >> Data, single: total=108.76GiB, used=107.11GiB > >> System, single: total=32.00MiB, used=20.00KiB > >> Metadata, single: total=3.00GiB, used=2.34GiB > >> ivan@ipplus-dev:~$ > > > > (If you can't mount the FS, how did you get this output? -- In what > > I say below, I'm asuming that this was the last output from btrfs fi > > df on the broken filesystem before it broke). > > > > This is the problem: You're using single for everything. That means > > that with the loss of one device, approximately one part in three of > > your filesystem is missing, including the metadata. If the missing > > drive is truly broken, this filesystem is dead, without any good means > > of recovery. You'll need to use your backups. > > > > You would have to have RAID-1 system and metadata for the FS to be > > even partly recoverable with a missing device. (Or RAID-10, -5 or -6). > > > > Hugo. > > -- Hugo Mills | Preventing talpidian orogenesis. hugo@... carfax.org.uk | http://carfax.org.uk/ | PGP: E2AB1DE4 |
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