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How to check Disk Speed (Read/Write) HDD, SSD Performance in CentOS 7

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Step 1. Login into the server using root credentials on putty. 

Step 2 : Run the following command to test the WRITE speed of a disk.

# sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync

Step 3 : Run the following command to test the READ speed of a disk.

 dd if=tempfile of=/dev/null bs=1M count=1024 

Thank you!!

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