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Test Hard disk Speed

Posted by Cbchung, 03-18-2012, 01:28 AM

Hi guys, i know how to test hard disk speed using dd, for centos. But the speed are for both disk because my disk are on software raid 1. Now the speed turns to be only 38mbps, and i want to check the speed of each hard disk, how can i do that? --manage --remove the sda1 and test again for each hdd? Is that the only way?

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Posted by ramnet, 03-18-2012, 06:59 AM

You should use a utility designed for testing hard drives, such as hdparm. hdparm -Tt /dev/sdX You can also find various hard disk benchmark programs such as bonnie++ You should not use a tool such as dd to test hard disk speeds as it was not designed to do that and will not yield realistic/accurate results.

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Posted by SiteServing, 03-19-2012, 11:38 AM

You can use dd to test the speed: dd if=/dev/zero of=/tmp/testfile bs=8k count=256k

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