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The figure shows two database nodes: exa1 and
exa2.
The first host (exa1) contains two guest VMs:
exa1vm1 and exa1vm2.
The second host (exa2) also contains two guest VMs:
exa2vm1 and exa2vm2.
RAC cluster 1 contains exa1vm1 and exa2vm1, with quorum
disks at /dev/exadata_quorum/QD_DATAC1_EXA1VM1 and
/dev/exadata_quorum/QD_DATAC1_EXA2VM1.
RAC cluster 2 contains exa1vm2 and exa2vm2, with quorum
disks at /dev/exadata_quorum/QD_DATAC2_EXA1VM2 and
/dev/exadata_quorum/QD_DATAC2_EXA2VM2.