title: EC2 Instance, mount volume DOS/MBR boot sector
body: <p>I'm trying to mount the main /dev/sda1 volumen from an EC2 instance, to a new one, but I have these issues:</p>
  
  <pre><code>$ sudo mount -t ext4 /dev/xvdg /mnt/xvdg/
  mount: wrong fs type, bad option, bad superblock on /dev/xvdg,
         missing codepage or helper program, or other error
  
         In some cases useful info is found in syslog - try
         dmesg | tail or so.
  </code></pre>
  
  <p><strong>info from dmesg:</strong></p>
  
  <pre><code>$ dmesg | tail
  [  673.481965]  xvdg: xvdg1
  [  673.589140]  xvdg: xvdg1
  [  673.711554]  xvdg: xvdg1
  [  673.802113]  xvdg: xvdg1
  [  673.872627]  xvdg: xvdg1
  [  673.978105]  xvdg: xvdg1
  [10382.432880] EXT4-fs (xvdg): VFS: Can't find ext4 filesystem
  </code></pre>
  
  <p><strong>More info:</strong></p>
  
  <pre><code>$ sudo fdisk -l /dev/xvdg
  Disk /dev/xvdg: 16 GiB, 17179869184 bytes, 33554432 sectors
  Units: sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disklabel type: dos
  Disk identifier: 0x00000000
  
  Device     Boot Start      End  Sectors Size Id Type
  /dev/xvdg1 *    16065 33543719 33527655  16G 83 Linux
  Looking for more info, got to this link 
  </code></pre>
  
  <p>I also followed <a href="https://linuxexpresso.wordpress.com/2010/03/31/repair-a-broken-ext4-superblock-in-ubuntu/" rel="noreferrer">these steps</a> to Repair a broken Ext4 Superblock. But it doesn't work.</p>