Re: SAS v SATA interface performance
From: Greg Freemyer <hidden>
Date: 2007-12-01 14:37:04
On Dec 1, 2007 2:43 AM, Richard Scobie [off-list ref] wrote:
Alan Cox wrote:quoted
If you want really high performance use multiple drives, on multiple PCIE controllers. Just make sure your backup planning of raid 1+0 setup is done right as many drives means a lot more drive fails.Thanks again. For what it's worth, I shall be attempting this with SATA drives in a RAID 50 configuration - 2 x 8 drives, using md RAID and an 8 lane PCIe SAS HBA.
I suspect many of us will be curious of the performance results. Also, if you have Port Multiplexers (PMPs) in use, that would be interesting to know. I don't even know if PMPs are supported via SAS controllers in 2.6.24 or not. ie. PMP support is new to 2.6.24 and only a few Sata controllers will have PMP support in 2.6.24. Greg -- Greg Freemyer Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer First 99 Days Litigation White Paper - http://www.norcrossgroup.com/forms/whitepapers/99%20Days%20whitepaper.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com