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 > > /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 >
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