On Wed, 2008-07-16 at 14:54 -0400, Alan D. Brunelle wrote: > Ben Martin wrote: > > Hi, > > Apologies if posting this here is inappropriate but a recent article > > of mine compares the Linux Kernel RAID code to an $800 hardware RAID > > card and might be of interest to list members: > > > > http://www.linux.com/feature/140734 > > > > Hi Ben - > > Did you do any performance testing of running /multiple/ disks through > the Adaptec card w/out HW RAID enabled - for example, comparing the 4 > ports on the mobo against 4 drives exported through the Adaptec card? Good question, however I must admit that I didn't test this. Being an 8 lane PCIe card it I thought that there would not be a huge issue with the interface to the card and drives being a bottleneck. http://www.adaptec.com/en-US/products/Controllers/Hardware/sas/value/SAS-31205/ Though it would be interesting to compare, once I move a few old drives off the mobo SATA controller and get 4 ports free. > > I wonder if there are any potential bottleneck issues with the single > adapter card handling 6 independent drives (when testing SW RAID) versus > one exported "drive" (when testing HW RAID). > > Regards, > Alan
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