Qu Wenruo <quwenruo.btrfs@xxxxxxx> 於 2020年2月7日 週五 下午3:16寫道： > > > > On 2020/2/7 下午2:16, Chiung-Ming Huang wrote: > > Qu Wenruo <quwenruo.btrfs@xxxxxxx> 於 2020年2月7日 週五 下午12:00寫道： > >> > >> All these subvolumes had a missing root dir. That's not good either. > >> I guess btrfs-restore is your last chance, or RO mount with my > >> rescue=skipbg patchset: > >> https://patchwork.kernel.org/project/linux-btrfs/list/?series=170715 > >> > > > > Is it possible to use original disks to keep the restored data safely? > > I would like > > to restore the data of /dev/bcache3 to the new btrfs RAID0 at the first and then > > add it to the new btrfs RAID0. Does `btrfs restore` need metadata or something > > in /dev/bcache3 to restore /dev/bcache2 and /dev/bcache4? > > Devid 1 (bcache 2) seems OK to be missing, as all its data and metadata > are in RAID1. > > But it's strongly recommended to test without wiping bcache2, to make > sure btrfs-restore can salvage enough data, then wipeing bcache2. > > Thanks, > Qu Is it possible to shrink the size of bcache2 btrfs without making everything worse? I need more disk space but I still need bcache2 itself. Regards, Chiung-Ming Huang > > > > /dev/bcache2, ID: 1 > > Device size: 9.09TiB > > Device slack: 0.00B > > Data,RAID1: 3.93TiB > > Metadata,RAID1: 2.00GiB > > System,RAID1: 32.00MiB > > Unallocated: 5.16TiB > > > > /dev/bcache3, ID: 3 > > Device size: 2.73TiB > > Device slack: 0.00B > > Data,single: 378.00GiB > > Data,RAID1: 355.00GiB > > Metadata,single: 2.00GiB > > Metadata,RAID1: 11.00GiB > > Unallocated: 2.00TiB > > > > /dev/bcache4, ID: 5 > > Device size: 9.09TiB > > Device slack: 0.00B > > Data,single: 2.93TiB > > Data,RAID1: 4.15TiB > > Metadata,single: 6.00GiB > > Metadata,RAID1: 11.00GiB > > System,RAID1: 32.00MiB > > Unallocated: 2.00TiB > > > > Regards, > > Chiung-Ming Huang > > >
