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RAID cpu usage

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Intel ICH8R/ICH9R south-bridges have RAID capabilities built into them.

They're kinda hardware RAID as the whole process s invisible to windows, but it uses the CPU to do the calculations for striping/parity.

So what i want to know is, when the RAID controller is stealing CPU cycles, is that visible in windows at all?

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um, so the motherboard doesn't have a seperate raid controller doing the number crunching to calculate parity? If so, yes - it will be slower (your mileage may vary as to how much slower).

WTF? why would you include a raid controller on a motherboard if your just gonna task the cpu to do the calcs? I mean, isn't that what software based raid is for?

Reply to mford66215

That is correct.

But that is the case, with EVERY MOTHERBOARD that has an intel chipset released in the past 3-4 years. :D

Intels implementation is kinda different to software RAID -

software RAID is handled by the OS, the disks are only usable when the OS is booted, and the OS's partition cannot be raided.

intels implementation is done through hardware - windows does not see it, it works with the startup disk, and it can't "crash" if windows dies.

Actually, most cheaper hardware RAID controllers made by SIIG, adaptec and promise also offload onto the cpu...

Reply to technology-sponge
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