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4xhdd test speed with smart array e200 controller

Arvudas
Occasional Contributor

4xhdd test speed with smart array e200 controller

Hi,
Have HP Proliant ML 110 server and HP smart array E200 controller. When i use one hdd and test it with HD tune program, he show me average 50MB/s speed. That is one hdd speed, normal. When use 2xHDD in RAID 0 array this program show me average 100MB/s. when use 3xHDD show me 150MB/s speed, but when use 4xhdd in RAID 0 array, then this program show me only 175MB/s. Should be average 200MB/s. Server, controller, driver, hdd is always same. Where can be problem?