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
A.
DBFS_DG
B.
DATA3_DBM1
C.
DATA2_DBM1
D.
DATA_DBM1
E.
RECO_DBM1
Explanation:
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/