/F in C#.NET

Generate QR-Code in C#.NET /F

The Disk Defragmenter utility does not fully defragment the drive. A volume must have at least 15 percent free space before Disk Defragmenter can completely defragment the volume. If you have less free space available, the operation will run, but only partial defragmentation will result. Check the value at the right of the drive entry in the Defragmenter console to confirm current free space values for the selected drive. If necessary, delete or move files to make extra room. You cannot defragment a volume that Windows has marked as possibly containing errors. To troubleshoot this possibility, enter chkdsk d: /f at any command prompt, substituting the letter of the drive in question. Chkdsk will report and repair any file-system errors it finds. Disk Defragmenter does not defragment files in the Recycle Bin. Empty the Recycle Bin before defragmenting. Additionally, Disk Defragmenter does not defragment the following files: Bootsect.dos, Safeboot.fs, Safeboot.csv, Safeboot.rsv, Hiberfil.sys, and Memory.dmp. In addition, the Windows page file is never defragmented. (See the text following this sidebar to learn how to work around this issue.) With some large files, it takes several passes to fully defragment the files in question. If the View Report option shows one of these stubborn files, try moving it to another drive before running a full defragmentation pass. After defragmentation is complete, move the file back to its original location. You should be able to copy the file to the newly optimized drive without any problems. Disk Defragmenter will pass over any files that are currently in use. For best results, shut down all running programs before running the utility. For even better results, log off and log back on (using an account in the Administrators group) before continuing.

The command-line Disk Defragmenter does not provide any progress indicator except for a blinking cursor. To interrupt the defragmentation process, click in the command window and press Ctrl+C. Using Disk Defragmenter s Analysis Report, you can determine whether your page file is fragmented. (For an explanation of how the page file works, see Making the Most of Virtual Memory, page 337.) Although page file fragmentation is normally not a serious issue, a severely fragmented page file can reduce your system s performance. Disk Defragmenter cannot consolidate your page file, because Windows holds it open while you work. However, if

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Performing Routine Maintenance you have more than one volume available (even if the second volume is on the same physical hard disk as your system drive), you can work around the problem as follows:

1 Open Control Panel and double-click the System icon. 2 On the Advanced tab of the System Properties dialog box, click the Settings button under Performance. 3 On the Advanced tab of the Performance Options dialog box, click Change under Virtual Memory. 4 From the list of available drives, choose a volume other than the one that holds your current page file. This drive will hold your temporary page file. 5 Choose the Custom Size option, enter settings in the Initial Size and Maximum Size boxes to match your current page file, and click Set. 6 Select the drive that contains the fragmented page file, set the Initial Size and Maximum Size boxes to 0, and then click Set. 7 Reboot to allow your system to stop using the old page file and begin using the new one. 8 Defragment the drive that previously held your page file. This consolidates the free space on that volume so that your new page file will be stored in contiguous space. 9 Repeat steps 1 through 6, this time creating a page file on the original disk and eliminating the temporary page file you created. Then reboot to allow the new, defragmented page file to take over.