I've tested the lot - trust me - LSI megaraid is far buggier than HP. They seem to have used all default settings, which could have favored either card given any particular workload. The Dell H700 supports 512MB or 1GB of cache, if I remember correctly.ĥ) I didn't see any attempt to tune the controller settings for maximum performance for a given workload. The HP P4xx cards come with 256MB, 512MB, or 1GB of cache, and there is a very large performance difference between these configurations. RAM speed could also have been different - or not since they didn't specify.ģ) Two different expander backplanes in the arrays.Ĥ) The very small test size (4GB) means that cache will contribute greatly to the results, but I did not see a mention of how much cache each card had. In the case of a BIOS problem, the performance difference between the two could be very large. Same CPU across both, but still two different servers tested. Here are the issues that I noted:ġ) Two different servers. More specifically, there were too many unspecified configuration details and outright differences between the two test systems to conclude that one controller or the other is better. ![]() ![]() As much as I love head-to-head benchmarking, this one is too loosey-goosey to be useful.
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