title: Cant mount my hard drive
body: <p>When I try to mount one of my hard drives, it can't locate the folder with the hard drive.</p>
  
  <p>This is the output for the command <code>df</code>:</p>
  
  <pre><code>Filesystem                       1K-blocks      Used Available Use% Mounted on
  rootfs                            33000428    119124  32881304   1% /
  none                              33000428    119124  32881304   1% /
  198.27.85.63:/home/pub/rescue.v7 886788312 250295096 591423904  30% /nfs
  198.27.85.63:/home/pub/pro-power 886788312 250295096 591423904  30% /power
  198.27.85.63:/home/pub/commonnfs 886788312 250295096 591423904  30% /common
  tmpfs                                10240       204     10036   2% /dev
  tmpfs                              6600088        72   6600016   1% /run
  tmpfs                                 5120         0      5120   0% /run/lock
  tmpfs                             13200160         0  13200160   0% /run/shm
  </code></pre>
  
  <p>This comes when I run the command <code>fdisk -l</code>:</p>
  
  <pre><code>WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
  
  
  Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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
  Disk identifier: 0x00000000
  
     Device Boot      Start         End      Blocks   Id  System
  /dev/sdb1               1  3907029167  1953514583+  ee  GPT
  
  WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
  
  
  Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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
  Disk identifier: 0x00000000
  
     Device Boot      Start         End      Blocks   Id  System
  /dev/sda1               1  3907029167  1953514583+  ee  GPT
  
  Disk /dev/md3: 1978.9 GB, 1978886193152 bytes
  2 heads, 4 sectors/track, 483126512 cylinders, total 3865012096 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
  Disk identifier: 0x00000000
  
  Disk /dev/md3 doesn't contain a valid partition table
  
  Disk /dev/md2: 21.0 GB, 20970405888 bytes
  2 heads, 4 sectors/track, 5119728 cylinders, total 40957824 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
  Disk identifier: 0x00000000
  
  Disk /dev/md2 doesn't contain a valid partition table
  </code></pre>
  
  <p>When I try to mount the <code>/dev/sda1</code> hard drive with the command <code>mount -o barrier=0 /dev/sda1</code> it gives me this message:</p>
  
  <pre><code>mount: can't find /dev/sda1 in /etc/fstab or /etc/mtab
  </code></pre>
  
  <p>How can i fix this, so i can backup all of my stuff?</p>
  
  <p>This comes when I try to mount <code>/dev/sdb3</code>:</p>
  
  <pre><code>mount: unknown filesystem type 'linux_raid_member'
  </code></pre>
  
  <p>Then I tried to use the command <code>mdadm --assemble --run /mnt /dev/sdb3</code> but then it just gives me this:</p>
  
  <pre><code>mdadm: /dev/sdb3 is busy - skipping
  </code></pre>
  
  <p>This is my output from using cat /proc/mdstat</p>
  
  <pre><code>md2 : active raid1 sda2[0] sdb2[1]
        20478912 blocks [2/2] [UU]
  
  md3 : active raid1 sda3[0] sdb3[1]
        1932506048 blocks [2/2] [UU]
  
  unused devices: &lt;none&gt;
  </code></pre>
  
  <p>I can mount md3, but no files appears in the folder <code>/mnt</code></p>