Adding 3 SATA disks to PowerEdge R730 with PERC H730 Mini controller.

No, he said 3 disks, and adding as their own Virtual Disk. 

Yes, this can be done. The PERC can support up to 64 separate Virtual Disks.

EDIT: as I misread the op to say he was adding two disks, not the three he states

"Will the PERC controller be able to configure these new disks as a RAID 5 array ?" - Yes

"Will the PERC controller be able to add these new disks to my existing RAID 5 array ?" - Also Yes

Plenty of YT on the first option, you would use OCE (Online Capacity Expansion) ... your case would be the last one in the list.  I just did this to a RAID10, the only thing is the "reconstruction" is taking forever

Online Capacity Expansion (OCE) can be done in the following  ways:

• If there is a single virtual disk in a disk group and free space is available. The virtual disk’s capacity can be expanded within that free space.
• If a virtual disk is created and it does not use the maximum size of the disk group, free space is available.
•  A virtual disk's capacity can also be expanded by performing an OCE operation to add more physical disks.

Whoops - Edited my reply

Thanks guys that answered my question perfectly, 3 SATA disks, RAID 5 virtual disk, leaving existing arrays alone, job done.

Hi! I have a very similar setup (2 boot disks In RAID1 mode), and someone added a third sata disk as a second disk group. This is currently working ok. Now when I want to add a fourth disk (my intention is to add it as another 3rd indepenent disk group/virtual disk, not expand or add to the 2nd disk group) I'm surprised that I cannot create a new virtual disk or disk group. The option appears greyed out or is just not there. Anyone knows why or can help us work through this? The 4th physical disk appears as 'Ready' unlike all others that appear as 'online '.

Thanks in advance and have a happy new 2024! 

Hello, thanks for choosing Dell.

Could you tell us how you created VD?

And what is your RAID controller?

Happy New Year to you as well.