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тАО06-21-2010 11:47 PM
тАО06-21-2010 11:47 PM
quorum
will all the vg will be active ?
do i able to umount other mount points like /tmp in vg00 and oracle in vg45.
how can i act to that.
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тАО06-22-2010 12:08 AM
тАО06-22-2010 12:08 AM
Re: quorum
it will work if the root disk is mirrorred.
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тАО06-22-2010 01:06 AM
тАО06-22-2010 01:06 AM
Re: quorum
So if a vg00 contains only 2 disks and one of those fails, at next boot thye VG will not activate.
We usually get around this by specifying an option to activate the VG even with low quorum by adding a "-lq" argument to the boot string. Exactly how this is implemented varies between HP9000 (PA-RISC) and Integrity (IA64) servers. Which do you have?
>> do i able to umount other mount points like /tmp in vg00 and oracle in vg45
The question makes no sense - if you don't have quorum on vg00, the VG won't activate and the system won't boot (unless you have specified low quorum)
HTH
Duncan
I am an HPE Employee
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тАО06-22-2010 04:31 AM
тАО06-22-2010 04:31 AM
Re: quorum
reboot or what happens exactly @ the time.
suppose we have two disk mirrored but not given hpux -lq in auto file
so @ the time how all vg will be ?????
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тАО06-22-2010 04:33 AM
тАО06-22-2010 04:33 AM
Re: quorum
If a disk in vg00 fails during OS is up and running, it stay up and running, no matter if booted in quorum mode or not.
Quorum mode come into play during VG activation only!
@@@@@@@@@@@@@@@
Hope this helps!
Regards
Torsten.
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тАО06-22-2010 04:34 AM
тАО06-22-2010 04:34 AM
Re: quorum
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тАО06-22-2010 04:35 AM
тАО06-22-2010 04:35 AM
Re: quorum
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
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тАО06-22-2010 04:38 AM
тАО06-22-2010 04:38 AM
Re: quorum
you will not get any problem as such when u access you lvols incase of disk failure
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тАО06-22-2010 04:45 AM
тАО06-22-2010 04:45 AM
Re: quorum
quorum means, ">50% of the disks in the VG are available"
In case you have a VG with 2 disks, 1 failed, you have =50%, but not >50% - so activation will fail.
If you have a VG with 4 disks, 1 failed, you have 75%>50%; activation will work.
You can always overwrite the quorum check.
Is the quorum check useful?
IMHO it depends.
If you have let's say a VG00 with 3 disks, not mirrored (not unlikely some years ago with small disks!), you loose the data of the failed disk, but the system will try to boot.
If you overwrite the quorum check by default ("-lq"); so the system will always boot if the mirrored root disk is dead.
If the mirror partner is dead and the system does not boot because of the failed quorum check, you are alerted, manually overwrite the check and boot up.
This is IMHO the most useful use of the check.
And finally: Once the VG is activated; it remains activated even if you loose several disks. This does not mean you still can access all your data - this depends.
Hope this helps!
Regards
Torsten.
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those who understand binary, and those who don't.
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тАО06-22-2010 05:09 AM
тАО06-22-2010 05:09 AM
Re: quorum
Check the following link -
http://forums2.itg1.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1259433598707+28353475&threadId=26178
Regards,
Murali