Using 3 redo log file groups

1. g1_loga.ora: This is member 1 of group 1 stored on disk 1.
2. g1_logb.ora: This is member 2 of group 1 stored on disk 2.
3. g2_loga.ora: This is member 1 of group 2 stored on disk 1.
4. g2_loga.ora: This is member 2 of group 2 stored on disk 2.
5. g3_loga.ora: This is member 1 of group 3 stored on disk 1.
6. g3_loga.ora: This is member 2 of group 3 stored on disk 2.
7. LGWR: LGWR will write to members 1 & 2 of group 1. When a switch occurs, LGWR will write to members 1 & 2 of group 2. On the next switch LGWR will write to members 1 & 2 of group 3.
8. disk 1: If disk 1 fails, LGWR will continue writing to disk 2 without database failure.
9. disk 2: If disk 2 fails, LGWR will continue writing to disk 1 without database failure.
10. redo group 1: There must be at least 2 members of the same size in each group. Each group should contain the same number of members.
11. redo group 2: There must be at least 2 members of the same size in each group. Each group should contain the same number of members.
12. redo group 3: There must be at least 2 members of the same size in each group. Each group should contain the same number of members.