ext 4 “JBD2: no valid journal superblock found”

JBD2: no valid journal superblock found
EXT4-fs (sdf1): error loading journal


seems a hardware problem or not because with fat it works fine … but with ext4 no.. .:S

anyway solution :

mke2fs -t ext4 -O ^has_journal /dev/sdf1


4 Responses to ext 4 “JBD2: no valid journal superblock found”

  1. Greg Marks says:

    Thanks for the solution! I was having this problem with two new 62.9 GB thumb drives ext4-partitioned with GParted.

    • nowardev says:

      this mean poor hardware quality btw …

      • Greg Marks says:

        Unfortunately (for me), you are absolutely correct about that. Testing the flash drives for errors with the command

        sudo badblocks -w -s -o logfile.log /dev/sd

        resulted in enormous numbers of comparison errors. Since the thumb drives are therefore unreliable, I’ve thrown them away. Incidentally, to anyone reading this, the “badblocks” command given above will overwrite all data on /dev/sd, so if you use it, you’d better be sure the device is the correct one and that you’re prepared to lose anything that might be stored on it and then reformat it.

      • Greg Marks says:

        (That was supposed to read: /dev/sda or /dev/sdb or /dev/sdc or …, as the case may be. Apparently characters between angle brackets won’t display here.)

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