A unique, individual set of antibodies, called individual specific autoantibodies (ISA) is found in blood, serum, saliva, urine, semen, perspiration, tears, and body tissues, and the antibodies are not affected by illness, medication, or food/drug intake.
A quorum is the number of members of a governing body who must be present for the body to conduct business; no binding decisions can be made unless a quorum is present. Robert's Rules of Order, the definitive source on parliamentary procedure states that a majority of members must be present to have a quorum.
When the node that owns the quorum disk does not function correctly, the surviving nodes arbitrate to take ownership of the device. In a single cluster, there is a local quorum resource. In the event of a hardware failure of the quorum disk, it may be necessary to designate another device as the quorum disk.