Hi I have some strange performance results on a raid0 I have 4 IDE disks on two controllers, the one on the motherboard of the duron 1 GHz mackine, the other a promise TX2 plus SATA + PATA controller. I run kernel 2.4.22 The disks and hdparm -t on each of them /dev/hdc1 seagate 80 GB 16 MB/s /dev/sda1 maxtor sata 200 GB 50 MB/s /dev/sdb7 maxtor 160 GB 54 MB/s The partitions are al about 5 GB each. If I make a raid0 device of all of them I get a thruput of 45 MB/s IIf I exclude the hdc1 partition, I get around 75 MB/s. The system is a little loaded - but that would be normal operating conditions. CPU is 90 % idle. I have about 100 MB free RAM. Why is it slower with 3 disks in the raid0 than 2 disks? Why don't I get approx 100 MB/s out of just the two? Best regards Keld - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
