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You are patching your Exadata X6 Database Machine by applying a new image to the Storage Servers in a rolling fashion. Your ASM environment on the Database Machine has five diskgroups stored on an unpartitioned Exadata storage grid, with redundancy settings as shown: 1. DATA_DBM1 - Normal Redundancy 2. RECO_DBM1 - Normal Redundancy 3. DBFS_DG - Normal Redundancy 4. DATA2_DBM1 - High Redundancy 5. DATA3_DBM1 High Redundancy Which two diskgroups will not suffer from any data loss throughout the patching process even if there is a single disk failure on one of the cells
Correct Answer: D,E
Explanation/Reference: HIGH redundancy provides protection against 2 simultaneous disk failures from 2 distinct storage servers or 2 entire storage servers. HIGH redundancy provides redundancy during Exadata storage server rolling upgrades. References: http://blog.umairmansoob.com/choosing-high-vs-normal-redundancy-with-exadata/