Expansion only possible if there is only one virtual disk on that disk group. if there are multiple virtual disk on same physical disk group then capacity expansion is not possible.  You can replace drive one by drive. You need to ensure drive if offline before replacing the drive else there could be data corruption. Once replaced you need to wait till rebuild complete before replacing next drive. You can use iDRAC or OMSA to make drive offline. Below link have instructions on replacing the drive. [URL]  Note : During rebuild there will be a impact on disk performance. It is good practice to backup your data before carrying out any maintenance tasks.
No more space to add new physical Disk RAID 10 using 6 4TB disk, currently running out of space on virtual disk. Can I swap each disk out one at a time in RAID 10 with larger disk then once all disk are replaced expand the virtual disk ? Or do I have to shutdown server - pull all existing disk and created new RAID 10 Virtual Disk and restore from backups ? PERC H330 POWEREDGE T440 NON OS DRIVE - IT IS ON SEPERATE RAID 1 VIRTUAL DISK
RAID 10 EXPAND PERC H330 POWEREDGE T440