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administration:system-mirror [2008/03/12 20:35] – damiradministration:system-mirror [2008/11/24 11:36] – damir
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 ===== Prologue ===== ===== Prologue =====
  
-  * with the instructions that follow we move a complete root system disk from bare partitions to a raid 1 software layer. +  * with the instructions that follow we move a complete root system disk from bare partitions to a RAID 1 software layer. 
-  * all the work is done without putting the server off-line, but it's better to stop the services before starting the copy of the files from the old disk to the new one.+  * obviously you can use the same trick to upgrade to a RAID 5 software system 
 +  * **all the work is done without putting the server off-line, but it's better to stop the services before starting the copy of the files from the old disk to the new one**
   * only one reboot process is needed if the disks are already installed on the server and if the whole process is correct.   * only one reboot process is needed if the disks are already installed on the server and if the whole process is correct.
  
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   * wait until the system is copied   * wait until the system is copied
      
 +
 ==== Create the new initrd image file ==== ==== Create the new initrd image file ====
   * after the copy we need to create a new initrd and change the information in the **/1/etc/fstab** file   * after the copy we need to create a new initrd and change the information in the **/1/etc/fstab** file
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   * the reference to the swap partition on the first disk must be commented   * the reference to the swap partition on the first disk must be commented
  
-  * now we can create the new initrd image+  * now we can create the new initrd image **include also the serial-ata module, if necessary**
 <code> <code>
-mkinitrd --preload raid1 --preload raid456 --fstab /1/etc/fstab /boot/initrd-2.6.23.15-80.fc7-2.img 2.6.23.15-80.fc7+mkinitrd --preload raid1 --preload raid456 --preload sata_nv --fstab /1/etc/fstab /boot/initrd-$(uname -r)-raid.img $(uname -r)
 </code> </code>
 +
  
 ==== Edit the grub configuration file in the original disk ==== ==== Edit the grub configuration file in the original disk ====
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         root (hd1,0)         root (hd1,0)
         kernel /vmlinuz-2.6.23.15-80.fc7 ro root=/dev/vg1/root vga=791 selinux=0 noipv6 panic=30         kernel /vmlinuz-2.6.23.15-80.fc7 ro root=/dev/vg1/root vga=791 selinux=0 noipv6 panic=30
-        initrd /initrd-2.6.23.15-80.fc7-2.img+        initrd /initrd-2.6.23.15-80.fc7-2-raid.img
 </code> </code>
  
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   rsync -aH /boot/ /1/boot/   rsync -aH /boot/ /1/boot/
 </code> </code>
 +
  
 ==== Reboot ==== ==== Reboot ====
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 </code> </code>
  
-  * at the boot prompt select the second boot option and verify that is the right one checking that contains the **root (hd1,0)** line+  * **at the boot prompt select the second boot option** and verify that is the right one checking that contains the **root (hd1,0)** line
   * if everything was right the system should boot with the raid 1 disk   * if everything was right the system should boot with the raid 1 disk
  
administration/system-mirror.txt · Last modified: 2009/03/16 15:00 by damir