megacli key commands in linux

List physical devices
megacli -PDlist -a1 |grep "Enclosure Device ID\|Slot Number\|Firmware state"

Assuming 6 spare PDs on Enclosure ID 32 with Slot nos 6-11:

Create RAID 6 array
megacli -CfgLdAdd -r6 [32:6,32:7,32:8,32:9,32:10,32:11] -a0

Create RAID 10 array
megacli -CfgSpanAdd -r10 -Array0[32:6,32:7] -Array1[32:8,32:9] -Array2[32:10,32:11] -a0
 
Check array status 
megacli -LDInfo -LAll -a0 

Delete array no. 2 (-Force may be required)
megacli -CfgLdDel -L2 -Force -a0

Extending an existing RAID array with a new disk
.megacli -LDRecon -Start -r5 -Add -PhysDrv[32:3] -L0 -a0

Creating a global hot spare

megacli -PDHSP -Set -PhysDrv [0:2] -a0

Show background initialization progress

MegaCli64 -LDBI -ShowProg -Lall -a0