I have doubt in PE2950iii server
Using Perc6i card will the 2950iii server support Raid5 in SATA HDD? Is there any specific Backplane need?
No special requirements are needed for support. All you need is the SATA drives in the appropriate carriers. The PERC6/i supports Dell SAS and SATA disks for all RAID levels supported by the card (including RAID 5)