We have just install a new VNX5400 with following configuration for storing ESXi 5/6 vmdk LUN and Oracle RAC LUN:-
1) 30 x 1 TB SAS Disks
2) 20 x 800 GB SSD Disks
We would like to maximize the usuable capacity as well as protection (allow more disk failure)
Which is a better choice?
1) RAID 1+0
2) RAID 5 (with 1 disk failure allowed)
3) RAID 6 (with 2 disk failure allowed)
Seems RAID 1+0 is good for performance, however, it lost half usuable capacity and disk sprindle.
Or, should RAID 6 be better performance than RAID 1+0 in this situation???
Also,we notice the first 4 disks are RAID 5 OS disk, is it possible to ask Vendor to regroup them into a big storage pool????
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