dection 5Storage Devices.docx

For example we may not know which file name a

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occur, which causes data to be stored incorrectly or maybe data on the surface of the platters to become disconnected. For example, we may not know which file name a particular file fragment is associated with. This disk error checking utility is going to go through and look for those kinds of errors, and it's going to automatically fix them for us as well. Now, in newer versions of Windows, this is done automatically.In older versions of Windows, you had to explicitly tell the error checking utility to try to fix errorswhen it found them. As you can see, this is going to take about three more minutes to complete, so I'll pause the recording and we'll come back when it's done. Okay, the scanning process is complete, the drive was successfully scanned, and no errors were found. We like that. We can come down here and click the Show Details button. And we can see more information about the scan process. I'm going to go ahead and expand this up here so we can see more information. You can see that I have the scan event that occurred today. This is today's date, and down here, in Event Viewer, we can see the results of the scan that provide you with a great deal of detail as to what was scanned and what errors were discovered. Go ahead and close Event Viewer,and we'll close the error checking utility results. Defragment the File System 10:18-13:39 The last thing we want to look at in this demonstration is how to defragment the hard drive.Understand that the NTFS file system fragments files as it saves them on the surface of the hard disk drive, and it does this to use disk space most effectively. However, by doing this, it also decreases diskperformance because the read/write heads, in order to write information to the platters, the read/write head has to search around and locate unallocated areas of the disk and save information there, and then, when it wants to read a file, it's got to hunt all over the surface of the disk, trying to find each of the different fragments of a given file so it can reassemble it and send it up to the operating system. Your drive will actually run a lot faster if you can take all those disparate chunks of those files, all those file fragments, and move them as close together on the surface of the platter as you can. That way, your read/write heads don't have to hunt all over the surface of the platter to find all of the pieces of the file, they're all in one location. So to do this, we click on Optimize, and then we can select which disk it is that we want to defragment. Right now the C: drive is selected by default. Now, I will point out that you don't actually have to do this manually very often. You may need to. However, on modern versions of Windows, the defragmentation process is run automatically for you on a schedule. Now, in older version of Windows, that was not the case. You did have to go in and run it manually, and if you ever ran into a system that hadn't been defragged in like a year or two, and I have had that happen, it would take hours, and hours, and hours to go through and try to defragment a heavily fragmented hard 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
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