Recovery Error

    While I try to get backup via online, I had this error which below. What should i do ? Thanks in advance.





    [*] Creating directory '/data'


    [*] Mounting '/dev/mmcblk0p2' to '/data'


    mount: unknown filesystem type '(null)'


    Warning: Failed to mount data filesystem


    [*] Downloading 'http://dreamboxupdate.com/download/recovery/dm820/release/recovery.sig'


    [*] Downloading 'http://dreamboxupdate.com/download/recovery/dm820/release/recovery'


    [*] Verifying signature of 'recovery'


    gpgv: Signature made Fri Nov 14 10:47:38 2014 UTC using RSA key ID 79E2C0CF


    gpgv: key 79E2C0CF was created 1413072219 seconds in the future (time warp or clock problem)


    gpgv: key 79E2C0CF was created 1413072219 seconds in the future (time warp or clock problem)


    gpgv: key 79E2C0CF was created 1413072219 seconds in the future (time warp or clock problem)


    gpgv: Good signature from "Dreambox DM820 Recovery <recovery@dm820.com>"


    [*] Running './recovery'


    [*] Options '-v'


    [*] Mounting '/dev/mmcblk0p2' to '/data'


    mount: unknown filesystem type '(null)'


    Warning: Failed to mount data filesystem


    [*] Downloading 'http://dreamboxupdate.com/download/recovery/dm820/release/dreambox-image-dm820.tar.xz.sig'