Tom's Hardware > Forum > Storage > Hard Disks > What's "normal" for CPU usage for ICH7R RAID 0

What's "normal" for CPU usage for ICH7R RAID 0

Forum Storage : Hard Disks - What's "normal" for CPU usage for ICH7R RAID 0

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Scottz   02-19-2006 at 10:30:27 PM

I have x2 Hitachi T7K250's 250Gig in RAID 0 on an Intel ICH7R controller.

Stripe size, transfer speed (1.5Gbps vs 3.0Gpbs), and NTFS Cluster size doesn't seem to make a difference in terms of "real world" use and CPU utilization.

All the benchmarking tools report about an average of 5% for CPU utilization, but doing a simple file copy on the same RAID 0 volume in WinXP Pro drives that up closer to 25% (with nothing else running including antivirus) when looking at task manager performance.

It's a new system with a new volume, so I don't have all the extras loaded or a frag issue.

I'm also using the latest Intel ICH7R driver (1035).

Before downgrading the driver or running out and getting a different controller to test with, what is "normal" for real-world CPU Utilization and RAID 0 on this controller?

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Codesmith   02-22-2006 at 07:26:42 PM
- 0 +

Writes use more CPU % than reads in my experience.

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Scottz   02-22-2006 at 08:35:39 PM
- 0 +

How about overall CPU usage though?

Is 20% normal for a simple file copy?

Thanks

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