Changes

http://bugs.contribs.org/show_bug.cgi?id=6195

http://bugs.contribs.org/show_bug.cgi?id=6195

With SME 8 being based on CentOS 5, assembling the RAID in rescue mode must be specified using the disk's UUID. If you have the SME 7 CD it will be easier to rename the Volume Group using it per the instructions below. Otherwise use the SME 8 procedure.

With SME 8 being based on CentOS 5, assembling the RAID in rescue mode must be specified using the disk's UUID. If you have the SME 7 CD it will be easier to rename the Volume Group using it per the instructions below. Otherwise use the SME 8 procedure.

  lvm vgrename orig_vg_name new_vg_name

  lvm vgrename orig_vg_name new_vg_name

  exit

  exit

Now remove the CD and reboot into SME 8 :

Now remove the CD and reboot into SME 8 :

You should now be able to view all your old data under /mnt/tmp

You should now be able to view all your old data under /mnt/tmp

  db configuration setprop backup Program CopyFromDisk status enabled

  db configuration setprop backup Program CopyFromDisk status enabled

All the usual warnings apply. Remember that any old contribs & templates will have to be reinstalled (assuming that they will work with V8)

All the usual warnings apply. Remember that any old contribs & templates will have to be reinstalled (assuming that they will work with V8)

===Reference information===

===Using a third drive===

 

 

 

== Using a third drive ==

I have just repeated the exercise and it seems to work OK. It was much easier having a third drive. Mark the drives so you know what each contains! I will refer to them as A, B & C - substitute the relevant drive paths accordingly.

I have just repeated the exercise and it seems to work OK. It was much easier having a third drive. Mark the drives so you know what each contains! I will refer to them as A, B & C - substitute the relevant drive paths accordingly.

I did the following :

I did the following :

*Added the third drive (C) as a hot spare - see : http://wiki.contribs.org/Raid#Adding_another_Hard_Drive_Later

#Added the third drive (C) as a hot spare - see : http://wiki.contribs.org/Raid#Adding_another_Hard_Drive_Later

*Stop the machine, remove one drive (B) and restart - this makes the array 'fail' and the hot spare will be added to the array and mirrored. Run the pre-backup for (A) & (C). Stop the machine.

#Stop the machine, remove one drive (B) and restart - this makes the array 'fail' and the hot spare will be added to the array and mirrored. Run the pre-backup for (A) & (C). Stop the machine.

*Remove the SME7 drives (A) & (C). Install SM8 on the first pulled drive (B) and apply any updates.

#Remove the SME7 drives (A) & (C). Install SM8 on the first pulled drive (B) and apply any updates.

*Stop the machine. Pull the original disk (A) and store it out of the way - you can always get yourself back with this drive. It is better to save (A) as (C) may not have a boot partition correctly installed - see the notes on adding a hot spare : http://forums.contribs.org/index.php/topic,38041.msg171631.html#msg171631

#Stop the machine. Pull the original disk (A) and store it out of the way - you can always get yourself back with this drive. It is better to save (A) as (C) may not have a boot partition correctly installed - see the notes on adding a hot spare : http://forums.contribs.org/index.php/topic,38041.msg171631.html#msg171631

*Reboot with an SME7 CD (see above for details) and the 'new' drive (C) and rename the LVM on it as detailed above.

#Reboot with an SME7 CD (see above for details) and the 'new' drive (C) and rename the LVM on it as detailed above.

*Stop the machine. Plug in the disk with SME8 (B) and the disk with SME7 (C). Boot from the SME8 disk (B). Mount the LVM on the SME7 disk (C) as above and restore from disk (C).

#Stop the machine. Plug in the disk with SME8 (B) and the disk with SME7 (C). Boot from the SME8 disk (B). Mount the LVM on the SME7 disk (C) as above and restore from disk (C).

*Check that the data has copied over OK, format disk (C) to wipe the old system and then add it to the SME 8 Array.

#Check that the data has copied over OK, format disk (C) to wipe the old system and then add it to the SME 8 Array.

*Finally once you are happy everything is working add back Disk (A)

#Finally once you are happy everything is working add back Disk (A)

==Recovering a system where pre-backup could not be run==

===Recovering a system where pre-backup could not be run===

{{Warning box| Only use this procedure where pre-backup cannot be run eg in the event of a corrupt filesystem and/or unbootbale server}}

{{Warning box| Only use this procedure where pre-backup cannot be run eg in the event of a corrupt filesystem and/or unbootbale server}}

Restart the mysqld service:

Restart the mysqld service:

   service mysqld start

   service mysqld start

----

----

[[Category:Howto]]

[[Category:Howto]]

[[Category:Administration:Storage]]

[[Category:Administration:Storage]]