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Hi, I've been referred to this list from the linux-raid list. I've been playing with a RAID system, trying to obtain best bandwidth from it. I've noticed that I consistently get better (read) numbers from kernel 2.6.8 than from later kernels. For example, I get 135MB/s on 2.6.8, but I typically get ~90MB/s on later kernels. I'm using this : <http://www.sharcnet.ca/~hahn/iorate.c> to measure the iorate. I'm using the debian distribution. The h/w is a MegaRAID 320-2. The array I'm measuring is a RAID0 of 4 Fujitsu Max3073NC 15Krpm drives. The later kernels I've been using are : 2.6.12-1-686-smp 2.6.14-2-686-smp 2.6.15-1-686-smp The kernel which gives us the best results is : 2.6.8-2-386 (note that it's not an smp kernel) I'm testing on an otherwise idle system. Any ideas to why this might be? Any other advice/help? Thanks! Max. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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