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Recovering SME Server with lvm drives (view source)

Revision as of 11:25, 9 November 2013

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→‎Recovering SME Server with lvm drives
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==Recovering SME Server with lvm drives==
 
==Recovering SME Server with lvm drives==
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The purpose of this howto is to give to you the abilities to access to your data if the SME Server 8 is broken and can't start in a normal way.
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you have several methods below, but all are done on a default Raid over LVM, therefore you might need to adapt to your configuration, if necessary.
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==Method A==
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If your issue concerns a grub issue, you should look to this [[Grub|wiki page]]
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{{note box| We go to work with [http://www.sysresccd.org/SystemRescueCd_Homepage SystemRescueCd] wich is a Linux system rescue disk available as a bootable CD-ROM or USB stick for administrating or repairing your system and data after a crash.[http://www.sysresccd.org/Download Download]. The goal is to get mounted your logical volumes on /mnt where you can save them on a usb disk.}}
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===Method with the official SME Server CDROM ===
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I presume that your SME Server is on a RAID over LVM, otherwise you will have to adapt this HOWTO.
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* start the system with your official SME Server CDROM
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* give at prompt : '''linux rescue'''
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* set your language and your keyboard
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* set to '''no''' the start of network interfaces
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* set to '''continue''' the question about how the system is mounted in /mnt/sysimage
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* set to '''ok'''
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* give at prompt :
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chroot /mnt/sysimage
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su -
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Now you have successfully mounted your LVM and you are able to read your data in a chroot environment, you can save them on a usb disk
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* to exit
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exit
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exit
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halt
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===Method with SystemRescueCd===
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{{note box| We go to work with [http://www.sysresccd.org/SystemRescueCd_Homepage SystemRescueCd] which is a Linux system rescue disk available as a bootable CD-ROM or USB stick for administrating or repairing your system and data after a crash.[http://www.sysresccd.org/Download Download]. The goal is to get mounted your logical volumes on /mnt where you can save them on a usb disk.}}
    
start the system with your system rescue cd or you usb stick, choose your keyboard settings
 
start the system with your system rescue cd or you usb stick, choose your keyboard settings
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  startx
 
  startx
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next start a terminal, after verify if your raid is initated.
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open a terminal to verify if your raid is initiated.
    
  cat  /proc/mdstat
 
  cat  /proc/mdstat
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  lvdisplay
 
  lvdisplay
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Now you have successfully mounted your LVM and able to read your data on /mnt/recover, you can save them on a usb disk with the file browser for example.
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Now you have successfully mounted your LVM and you are able to read your data on /mnt/recover, you can save them on a usb disk with the file browser for example.
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==Method B==
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===Method ===
 
Let’s try starting the raid and see what we get:
 
Let’s try starting the raid and see what we get:
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  user@user-desktop:~$
 
  user@user-desktop:~$
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==Method C==
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===Method with a ubuntu Cdrom===
 
based on http://www.linuxjournal.com/article/8874?page=0,0
 
based on http://www.linuxjournal.com/article/8874?page=0,0
  
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