This can apply to any OS, but since I am spec'ing hardware for a FreeBSD/FreeNAS system, I wanted to get some input from those of you that have been there and know what real world performance is going to be like.
My desire is to use cheap, commodity hardware, and before I jump off and spend a lot of money, I wanted to examine where hardware bottlenecks might arise.
I have a SAS/SATA controller card with 2 SFF-8087 ports that can theoretically handle traffic from 8 drives. And for arguments sake, lets say that each drive could actually get close to saturating a sata2 bus with 3 Gbps ... does it stand to reason that I need a slot on the motherboard rated at 24Gbps or higher for EACH card that I want to add to this system?
If my logic is correct, then each controller card would need to be at least a PCI Express x16 or PCI Express 2.0 x8, right? And I am just not seeing too many of these on the market?
Any thoughts? real world experiences?
My desire is to use cheap, commodity hardware, and before I jump off and spend a lot of money, I wanted to examine where hardware bottlenecks might arise.
I have a SAS/SATA controller card with 2 SFF-8087 ports that can theoretically handle traffic from 8 drives. And for arguments sake, lets say that each drive could actually get close to saturating a sata2 bus with 3 Gbps ... does it stand to reason that I need a slot on the motherboard rated at 24Gbps or higher for EACH card that I want to add to this system?
If my logic is correct, then each controller card would need to be at least a PCI Express x16 or PCI Express 2.0 x8, right? And I am just not seeing too many of these on the market?
Any thoughts? real world experiences?