Messages in this thread | | | Date | Fri, 24 Nov 2006 13:33:31 +0000 | From | Alan <> | Subject | Re: SATA Performance with Intel ICH6 |
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On Fri, 24 Nov 2006 14:07:01 +0100 "Martin A. Fink" <fink@mpe.mpg.de> wrote:
> If I understand the design of this chipset correctly, then I would have > expected, that the CPU needs to do only few work, instead I found out, that > writing to disk seems to be really hard work for the CPU.
It has some work to do - the amount in question depends upon the file system and device drivers in use. For very high throughput read up on the O_DIRECT feature.
> My final aim is to get around 140MB/s of data from 3 different Gigabit > Ethernet cards and store it on 3 harddisk drives that perform 50MB/s. > >From the SATA bus side there should be no problem. Each of the 4 SATAs on > this ICH6 chipset are capable of 150MB/s.
I doubt an ICH6 has the total memory bandwidth to achieve that to be honest, but with PCI-E maybe you can.
> So what makes my CPU that slow? Is it a hardware problem or a problem of > SATA driver of my operating system?
You don't give anything like enough information to even guess this. What controller, what disks, what driver, what kernel version ?
> By the way: I'm working with SuSE Linux 9.2 on a Dell Desktop PC, 1GB RAM
For vendor kernels, especially older ones it is probably best to ask the vendor first.
Alan
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