On Tue, Apr 12, 2016 at 9:48 AM, lenovomi <lenov...@gmail.com> wrote:
> root@ubuntu:/home/ubuntu# btrfs restore -D -v /dev/sda /mnt/usb/ > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > Csum didn't match > Couldn't read tree root > Could not open root, trying backup super > warning, device 2 is missing > warning devid 2 not found already > warning devid 3 not found already > warning devid 4 not found already > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > Csum didn't match > Couldn't read tree root > Could not open root, trying backup super > warning, device 2 is missing > warning devid 2 not found already > warning devid 3 not found already > warning devid 4 not found already > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > checksum verify failed on 17802818387968 found FF45E2D3 wanted BFB02AEC > Csum didn't match > Couldn't read tree root > Could not open root, trying backup super > Why are devices 2, 3, 4 missing? I think there's a known issue where btrfs fi show might see drives as available that other tools won't see. Try 'btrfs dev scan' and then repeat the restore command with -D just to see if the missing device warnings go away. If devices are missing, it's kinda hard to do a restore. If these are hard drives, there should be supers 0, 1, 2 and they should all be the same. But they may not be the same on each drive, so it's worth checking: btrfs-show-super -f <eachdevice> And then also btrfs-find-root <anydevice> -- Chris Murphy -- 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
