Sign in to follow this  
lovecomplex

16port pci-e x16 Controller Card?

Recommended Posts

Hey, I've been hunting and hunting and just can't seem to find the card I'm looking for. Has anyone ever ran across a pci-e x16 16-port (4 SAS ports) controller card (not raid) before?

I got the Highpoint RR2744 thinking it would fit the bill, as it's marked as a "Controller Card" but no such luck. What I'm really looking for is direct access from the OS to the harddrives, so I can query the drives and check SMART stats and whatnot, but all I can seem to find is pci-e x8 card for some reason.

Any help would be greatly appreciated.

-Joren

Share this post


Link to post
Share on other sites

Why are you hell-bent on a 16x slot? 8x is far more bandwidth then 16 drives will produce. Even if you had 16 x god SSDs, you will probably run into further issues down the I/O path.

LSI MegaRAID 9201-16i SAS HBA

ATTO ExpressSAS H60F SAS 2.0 Controller

Edited by amdoverclocker

Share this post


Link to post
Share on other sites

From reading (albeit on wikipedia) it sounded like pci-e x16 wouldn't even be enough to keep up with 16x6GB/s ports. Also the fact that the motherboard it's going into is only pci-e 1.0. Maybe my math was wrong though.

After some more research, I did find an LSI pci-e x16 with 16 external ports, but with a different port type (which would take much more expensive cables.) I think we will indeed just end up going with an x8 card unless I can somehow manage to get the rr2744 to act as an HBA.

Thanks for your response in any case.

-Joren

Share this post


Link to post
Share on other sites

If you really think the controller card is capable of this kind of throughput, then yes you'll need a PCIe 2.0 x16 (16 times 4Gbps) card to get anywhere close to the full 16-channel 6Gbps SAS. I'd be impressed if you could actually get such BW from one - that's 8 GB/sec. I've had a hard time getting > 1GB/sec from pretty high-end RAID cards lately.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this