23 October 2012

Shell Script to Check Hard disk Revolutions Per Minute (RPM) Speed


Q: What is RPM of Hard disk?

Ans: RPM Short form for Revolutions Per Minute, RPM is used to help determine the access time on computer hard drives. RPM is a measurement of how many complete revolutions a computer's hard drive makes in a single minute. The higher the RPM, the faster the data will be accessed; for example, if you were comparing two hard drives, one with 5400 RPM and another with 7200 RPM, the hard drive with a 7200 RPM will be capable of accessing data much faster than the 5400 RPM drive. However, it is also important to note that a 5400 RPM drive will be much cheaper than a 7200 RPM drive.

While it may not be a noticeable speed difference when loading small files, the RPM of a hard drive can make a signiicant difference when loading large files or several hundred or thousand files.

Q: How do I check my Hard disk RPM speed using terminal?

Ans: To check RPM of your Hard disk open terminal (Ctrl + Alt + t) and write following command

$ sudo hdparm -I /dev/sda | grep Rotation
Nominal Media Rotation Rate: 5400

Enjoy :)

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  1. When I enter the command line, it shows that the command is not recognized as an internal or external command