administration:system-mirror
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| administration:system-mirror [2008/03/12 19:35] – damir | administration:system-mirror [2009/03/16 14:00] (current) – 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. | + | |
| + | * **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. | ||
| Line 106: | Line 107: | ||
| * 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 **/ | * after the copy we need to create a new initrd and change the information in the **/ | ||
| Line 127: | Line 129: | ||
| * 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** |
| < | < | ||
| - | mkinitrd --preload raid1 --preload raid456 --fstab / | + | mkinitrd --preload raid1 --preload raid456 |
| </ | </ | ||
| + | |||
| ==== Edit the grub configuration file in the original disk ==== | ==== Edit the grub configuration file in the original disk ==== | ||
| Line 151: | Line 154: | ||
| root (hd1,0) | root (hd1,0) | ||
| kernel / | kernel / | ||
| - | initrd / | + | initrd / |
| </ | </ | ||
| Line 173: | Line 176: | ||
| rsync -aH /boot/ /1/boot/ | rsync -aH /boot/ /1/boot/ | ||
| </ | </ | ||
| + | |||
| ==== Reboot ==== | ==== Reboot ==== | ||
| Line 180: | Line 184: | ||
| </ | </ | ||
| - | * 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 | ||
| Line 220: | Line 224: | ||
| </ | </ | ||
| | | ||
| - | ==== add the second disk to the raid system ==== | + | ==== add the second disk to the raid system |
| < | < | ||
| Line 228: | Line 232: | ||
| * the raid subsystem is synchronizing the content of both disks | * the raid subsystem is synchronizing the content of both disks | ||
| - | ==== one last task is to create the second swap partition ==== | + | ==== .... and update the grub code ==== |
| + | |||
| + | < | ||
| + | grub | ||
| + | root (hd0,0) | ||
| + | setup (hd0) | ||
| + | quit | ||
| + | </ | ||
| + | |||
| + | ==== the last task is to create the second swap partition ==== | ||
| < | < | ||
| Line 235: | Line 248: | ||
| </ | </ | ||
| - | * uncomment the line about he swap partition inside /etc/fstab | + | * uncomment the line about the swap partition inside /etc/fstab |
| ===== Kernel upgrade ===== | ===== Kernel upgrade ===== | ||
administration/system-mirror.1205350532.txt.gz · Last modified: 2008/03/12 19:35 by damir