Dear Experts,
Is it advisable to have ASM normal redundancy if storage already have RAID 10 .
At storage level disk-groups have RAID 10 for +DATA and +FRA.
I am trying to understand the below oracle recommended
Use the storage array hardware RAID 1 mirroring protection when possible to reduce the mirroring overhead on the server.
Use ASM mirroring redundancy in the absence of a hardware RAID,
or when you need host-based volume management functionality, such as mirroring across storage systems.
What is need of host-based volume management functionality?
Thanks & Regards,
ivw