Hello all. I am having performance issues with SATA drives and I am wondering where I may look to figuring out what is going on and maybe tuning the discs to increase performance. I am running a two servers a production and a test server . One server is the older HP DL145 G1 running PATA using 2 drives in software RAID-1 and the other is a newer HP DL145 G2 running SATA hardware RAID-1. Each server has 4GB of memory and the newer G2 has a second processor. The old server is running RHEL3 ES U5 and the newer one is running RHEL4 ES U1. What I am noticing is when the drives are under load on the newer G2 server then the system becomes rather sluggish and preformance is extremely slow because of being io bound. I have included the dmesg of the hardware for the rhel4 based G2 server and the rhel3 based G1 server. Where is a good place to start looking and seeing where I can tune (if possible) to get better performance? Regards, Kurt Heine
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