What are 12c ASM enhancement?

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1. FlexASM,- simple you do not need 4 ASM instances for 4 nodes, 3 is enough as like scan
2. ASM metadata is now copied to multiple allocation units in the disk header
3. Replace disk command
4. Now you can create 511 disk groups no more 64 limit
5. Now you can estimate the rebalance/resync operations
6. 12c stores password files in ASM
7. Check logical corruptions using disk scrubbing
8. Failuregroup_repair_time for whole group in contrast to diskgroup_repair_time
9. OCR backup now goes to ASM disk group 

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