Hi all: I am looking to replace our backup server. The replacement server will be used in a disk-2-disk-2-tape setup using Arkeia software on an OES 11 platform. As such I need a lot of cheap storage on board or directly attached. I have spec'ed out an HP DL380 server with 12 3.5 inch drive bays, 2 500GB OS drives (RAID 1) and 6 4TB storage drives (RAID 6) for about $6K. That leaves 4 empty bays for future use. Since everything goes to tape, the disk storage is used to shorten the backup window and speed recovery, it does not have to be super reliable. I would love a way to use consumer-grade HDs to save money.

So, any suggestions?