Hi, thanks for choosing Dell. Yes, you can do it using OMSA. Could you read this?   [URL]     Online Capacity Expansion (OCE)   
Hello, Is it possible to increase the storage space on a Dell PowerEdge R440 (PERC H740P Adapter (Embedded)) by re-configuring RAID 5 without data loss? Right now I have 4x1.92TB SATA SSD which is already being used, and I have another new 2x1.92TB SATA SSD (same manufacturer). Can I increase space without losing data? If yes, it can be done by booting the server and / or using iDRAC9 (Web interface)? Thanks in advance!
Reconfigure RAID 5 to increase storage space without data loss.