dection 5Storage Devices.docx

Now on modern versions of windows down hereyou can

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disk drive. Now, on modern versions of Windows down here,you can see that this process is being run automatically once a week, therefore, the fragmentation is kept to a minimal state. In fact, if we look over here for our C: drive, notice that it's currently 0% fragmented. That's because this automatic defragmentation process is being run all the time, and so the disk is kept very nice and clean, but if for some reason, you saw that the disk was heavily fragmented and you wanted to manually defragment it, you'd first come up here, well, first you'd select the disk in question from the list of disks available, and then click on Analyze to see how badly fragmented that disk is. Let me wait just a minute while it goes through and looks at the file system and decides how badly fragmented the files are on that hard disk drive. Okay, so the disk has been analyzed. Notice here that it tells me that it's 0% fragmented. It's actually in pretty good shape, but if it were heavily fragmented, and then I wanted to manually defragment it, I would then come down and click the Optimize button and let the defragmentation process run. Now, when it runs, it's going to go through, and look at each file that's stored in the file system, then it's going to look for all the fragments that make up that file, and as best it can, it's going to try and copy those fragments to specific areas on the hard disk drive such that those fragments are very close together. That way the read/write head doesn't have to hunt all over the surface of the hard disk drive to try and find each of those fragments, and thus, we improve the performance of the disk. Now, be aware that for this defragmentation process to run, you've got to have adequate space on the hard diskdrive, specifically, you have to have a lot of free space available on the drive because it's going to have to copy things temporarily, out of their current location while it moves things around, and if you don't have free space available, it's not going to be able to do that. Summary 13:40-13:54 That's it for this demonstration. In this demo, we talked about some things you can do to optimize the hard disk drives in your system. We first looked at utilities you can use to clean up the disk to remove unnecessary files. We then talked about scanning the hard disk for errors, and then we ended this demonstration by talking about how to defragment the file system. Optimizing Disks in Linux 0:00-0:52 In this demonstration, we're going to talk about how to optimize disks on a Linux system. On Linux,there's no such thing as a defragmentation utility. The way that the Linux file systems work, you don't need it. But you do on Windows. So let's take a look at a couple of utilities you do use on Linux. Now these utilities are run from the shell prompt within the command line environment so I need open up a terminal session.
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