I have to infrequently add new drives to Dell RAID arrays like H700. For some reason it takes me couple searches to find the info so here so I can find it later.
List all drives
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aALL
Create a RAID array (e.g. RAID 0)
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r0 [32:4, 32:5] -aALL
List working RAID arrays
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -Lall -aALL
Confirm you got the right RAID array e.g. Virtual Disk 1
/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -L1 -aALL
Delete RAID array
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdDel -L1 -aALL