From: jeff barratt-mccartney (jbarratt@COMPSAT.COM)
Date: Thu Mar 18 2004 - 20:42:30 EST
other geniuses on this list will probably extrapolate, but I will try to
give you a hard and fast answer and a simple reason. quorum >50%(not >=50%).
a 2 disk mirrored vg will be varied off if one disk fails(ie 1 of 2
alive=50%, this is less than quorum). this is why quorum is turned off on a
2 disk mirrored vg. there is a lot more to this(and a lot of caveats(quorum
really checks the # of VGDAs), but this is the hard and fast answer.
the LVM a-z redbooks explain quorum really well.
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Leyden, Joseph
Sent: Thursday, March 18, 2004 5:00 PM
To: aix-l@Princeton.EDU
Subject: Re: what does "Quorum requirement turned off" basically mean?
I have a mirrored VG and want to know if I
really have to turn Quorum Requirement ON.
I'm trying to avoid bringing down the db so
I could varyoff/varyon VG.
JOe
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