This is a linux system with a MegaRaid controller. MegaCli is installed. I currently have:
Virtual Drive: 0 (Target Id: 0) Name : RAID Level : Primary-6, Secondary-0, RAID Level Qualifier-3 Size : 25.466 TB ... Virtual Drive: 1 (Target Id: 1) Name : RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0 Size : 223.062 GB ... Virtual Drive: 2 (Target Id: 2) Name : RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0 Size : 118.718 GB ... Virtual Drive: 3 (Target Id: 3) Name : RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0 Size : 111.281 GB ...
Now I would like to create another VD with a new disk that has been put in the system, but I don't want to have to put the server offline to do it via the MegaRaid tool/bios. I can do
megacli -CfgLdAdd -r0 [4:0] -a0
where 4 is the enclosure device ID and 0 is the slot number, and this should do the job just fine. However I am concerned with how it will affect the existing arrays and VDs. The 25TB array should remain untouched and I am simply concerned if creating the new VD from the new physical disk is safe to do, or am I risking the existing setup and, even worse, risking the data?
Will I be fine running the above command on the live system?