= Kiyoshi recovery 2010-02 =

This page documents the planned steps for the Kiyoshi disk recovery (see #2828).

 * Install debirf image - this will allow us to boot into a debian installation loaded completely in memory giving us full access to all underlying disks
 * After booting into debirf:
  * Prepare the disks so we can access them:
   * Initialize the RAID arrays
{{{
mdadm ....
}}}
   * Decrypt the RAID arrays
{{{
cryptsetup luksOpen /dev/md1 crypt_md1
cryptsetup luksOpen /dev/md2 crypt_md2
}}}
   * Scan for logical volumes
{{{
vgscan --mknodes
vgchange -aly
}}}
  * Move all logical volumes to sdc2
   * Find logical volumes with:
{{{
lvs
}}}
   * Examine to figure out which ones are on which physical volumes
{{{
lvdisplay -m vg_kiyoshi0/<logical-volume-name>
}}}
   * Move with:
{{{
pvmove --verbose vg_kiyoshi0/<logical-volume-name> <path/to/old/> </dev/sdc>
}}}
  * Ensure /dev/sdb is no longer in use
{{{
pvdisplay /dev/dm-2
}}}
  * De-commission /dev/sdb
   * Remove as logical volume
{{{
pvremove /dev/dm-2
}}}
   * Remove from RAID
{{{
mdadm ...
}}}
  * Run benchmarks to test read/write speeds based on current partition table
{{{
dd ....
}}}
  * Properly re-partition
   * Setup partitions
{{{
fdisk ....
}}}
   * Test to make sure this new partition means it really does write/read faster
{{{
dd ....
}}}
  * Re-add to raid arrays
{{{
mdadm --add /dev/md1 /dev/sdb2
mdadm --add /dev/md0 /dev/sdb1
}}}
  * Move logical volumes back from sdc (see above)