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+Recover Softraid/LVM
+####################
+Date: 2012-02-06 10:24
+:tags: mdadm, softraid, lvm
+
+MD Array fails to assemble
+==========================
+
+Find the Problem
+----------------
+
+.. code-block:: bash
+  
+    #?/bin/sh
+    cat /proc/mdstat
+    mdadm -D --scan
+    mdadm -E --scan
+    mdadm -E /dev/sd[abcdef]1
+
+Trying to assemble manually
+---------------------------
+
+.. code-block:: bash
+
+    #?/bin/sh
+    mdadm --stop /dev/md{0,127}
+    mdadm --assemble /dev/md0 /dev/sd{a,b,c,d,e,f}1 --force
+
+
+
+recover a failed device in the array
+------------------------------------
+
+.. code-block:: bash
+
+    #?/bin/sh
+    mdadm /dev/md0 --re-add /dev/sdx1 # will likely fail
+    mdadm --zero-superblock /dev/sdx1 # reap the device
+    echo 200000 > /proc/sys/dev/raid/speed_limit_min # speed up recovery
+    mdadm /dev/md0 --add /dev/sde1
+    sleep 56000 && echo "FINISHED!"
+
+
+
+
+Recover LVM after doing something stupid
+========================================
+
+Restore VolGroup Partitioning
+-----------------------------
+
+.. code-block:: bash
+
+    #?/bin/sh
+    # imagine you did something like 'vgremove vg'
+    vgdisplay -v # > logical volume: empty :(
+    # lvm stores backup of partitioning, yay
+    vgcfgrestore -f /etc/lvm/archive/vg_00018-2146062166.vg -v vg
+    vgchange -ay
+    vgdisplay -v # > logical volume: files1 
+    e2fsck /dev/vg/files1
+    mount /dev/vg/files1