Long does disc defrag take windows 7

Sorry this didn't help. Thanks for your feedback. I was running a disk defragment on an external drive, it says that it was zero percent fragmented but I defraged it any way. What is it doing???? This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question Report abuse. How to make effective disk defragmentation? How to defrag Windows 7? Maybe, some of you have a great understanding of one or more questions, but most people just know little or even nothing about defragment hard drive.

Therefore, we compose this post by answering these questions one after another. Defragmentation is much related to file systems on electromechanical disk drives, and it is the process of picking up all pieces of data which spread across a partition it is also called volume and then putting these pieces together.

Suppose: there are 10 clusters in one partition, and a file uses the first, the third, and the ninth cluster since one cluster cannot hold all content of the file, like this:. That is to say File 1 consists of 3 pieces, and each cluster holds one piece. Defragment hard drive is the process of putting these 3 pieces of data together so as to make a file saved in continuous space, as the following picture shows:. Now users would know how disk defragmentation works.

But at this time some users may ask why a file could be saved to several different locations on a drive rather than stored in one place. Actually, this is our second question of how fragments are generated.

Generally, when we are saving files to a new partition or volume, all files will be saved continuously, for example:. However, after one of these files is deleted, for instance File 3 is deleted, space occupied by this file will be marked available for new files, and file system can save any new file to the newly released space even if there is unused space left at the end of the drive file system just allocates space at random.

Definitely, space released by File 3 cannot hold all content of the new file, and file system has to allocate more space for this file from other released space or unused space. Thus we may get the following result:. The new file is made up of 2 parts: one is after File 2, and the other is after File 5.

Under this situation, we say data fragments are generated. Actually, apart from deleting and writing operation, editing or modifying an old file may cause fragments.

For example, the original size of File 1 is 20MB, but then we added some content to this file, making it 30MB now.

That is to say, extra 10MB space is required. At this time, if there is no free space available after File 1, file system needs to allocate 10MB unused space from other places for the added content, which means File 1 will spread across the drive and data fragments are generated, too. Once fragments reach to a certain degree, users need to defrag the disk or defrag computer.

If not, hard disk performance would be affected largely. There are lots of benefits to make defragment hard drive, and in this post, we just list major 3. As we know, all files saved on a hard disk here we refer to mechanical hard disk rather than SSD are accessed via the magnetic head.

If a file consists of multiple fragments, the hard disk especially magnetic head of the disk will do much extra work. To be specific, when we are accessing a file which is saved in 2 or more different locations, the head needs to move here and there so as to read all fragments of the file, thus increasing seek time.

However, after defragment hard drive, all pieces of the file will be gathered to one extent so that the head only needs to work in one extent. Tuesday, May 3, PM. The larger the hard drive, the longer it will take. The high end hardware takes an hour to 90 minutes on gb drive. Run the disk cleanup tool first, then the defrag. Start it at night a let it run. Wednesday, May 4, AM. Hi, The time of Defrag is depend on your hardware , the partition size and the storage file types.

This can be beneficial to other community members reading the thread. Friday, May 6, AM. Saturday, December 31, PM. It does depend on the hardware. But the answer of 90 minutes for a fragmented Gb drive - such as what you're describing is nonsense Mathematics here Sunday, December 2, AM.

I just defragged two computers for the first time, both using Windows 7 defrag in the system tools. What has me concerned is the amount of time that it is taking to defrag, compared to other programs that I have tried. OK - I just now downloaded and installed the current Defraggler and have the same problem, I think. When I run Auslogics Disk Defrag, it usually runs to completion in just minutes - never longer than 10 minutes.

This after a half hour of defragging with pretty much nothing else running. Settings, Options, Advanced. With Auslogics Disk Defrag, maybe the product is defragging only fragmented files, while Defraggler defragments both files and the hard drive itself. Is that correct or wrong? I can see that " restore points and hibernation unchecked. Is that what you want? Should I run with your 3 options all the time or should I run with those options only when running Defraggler in Safe Mode?

I saw that Defraggler ran when I rebooted - it defragged at least the paging file when it ran. I had forgotten that I had selected for Defraggler to run 1 time at reboot. I've never used Auslogic so can't help you there. But if it only takes mins then it's only doing some sort of quick defrag. If VSS is already disabled that's good. Leave it and the other ones off, I see no benefit in doing those three files. You need to be a member in order to leave a comment.