SUMMARY: restore a crashed test cluster

[lars.rieneck@xxxxxxxxxxx]

Hello all

Thanks to: Joachim Jaeckel, Martin Rønde Andersen, Bob Collins
For the very fine feedback

Problem: I have a 5.1B cluster with dupatch 3. To try our crash restore 
procedure,
I have taken a full backup with vdump to tape. I have then zerorised all 
disks including
the quorum disk. Booted on the UNIX cdrom, and restore the following
filedomians/filesets: 

	1) cluster_root#root
	2) cluster_usr#usr
	3) cluster_var#var
	4) root1_domain#root

I then go to the boot prompt again, and try to start the first member by 
booting, with the following command:

	>>> boot -fl ai dkb100.1.0.15.0

I then boot with the following kernel parameters, to
be able to boot without a quorum disk:

Enter: <kernel_name> [option_1 ... option_n]
  or: ls [name]['help'] or: 'quit' to return to console
Press Return to boot 'vmunix'
# vmunix clubase:cluster_expected_votes=1 clubase:cluster_qdisk_votes=0

The boot procedure starts, but stops after the following statements:


Waiting for cluster mount to complete
clsm: checking for peer configurations
clsm: initialized
CNX QDISK: Successfully claimed quorum disk, adding 0 vote.

Solution 1: From Bob Collins i got a restore procedure, to restore a
cluster on different hardware, that was very useful, Thanks.

Solution 2: When I boot on the UNIX cd-rom I got a different disk 
naming, than
the restored unix had. So I had to rename the disk devices to the 
correct
numbering according to the unix system i would like to restore.

Solution 3: When I make the backup of the cluster, the backup includes 
the disklabels.
It is a good idea to keep the cnx partition on the member boot disk, 
that spared me
from setting the cfs:cluster_root_dev1_min/maj values in the boot 
sequence.

Solution 4: When the members in the cluster has to be booted, both 
members MUST be
booted with the following commad: vmunix 
clubase:cluster_expected_votes=1
clubase:cluster_qdisk_votes=0. When both members are up, the quorum has 
to be deleted, 
before it can created again.


/Lars



-----------------------------------------
============================================================
The information contained in this message may be privileged 
and confidential and protected from disclosure.  If the 
reader of this message is not the intended recipient, or an 
employee or agent responsible for delivering this message to 
the intended recipient, you are hereby notified that any 
reproduction, dissemination or distribution of this 
communication is strictly prohibited. If you have received 
this communication in error, please notify us immediately by 
replying to the message and deleting it from your computer.

Thank you.
Tellabs
============================================================