After the disk is fragmented, a single file may exist in different locations on the physical drive in blocks, so the system will collect file fragments when reading files, which will reduce file access speed, and cause system performance degradation. Therefore, defragmenting files can improve the overall performance and operating speed of the computer.
Generally, the household users are suggested to defragment once a month, business users and servers do it once a half month. But it should be considered based on the fragmentation ratio. In the following situations, it is recommended to run the disk defragmentation program:
1. A large number of files have been added.
2. Only about 15% of available disk space.
3. A new program or a new version of Windows is installed.
4. Fragmentation exceeds 15%.
To analyze fragments
Step 1. Install and launch AOMEI Partition Assistant. In the left menu of AOMEI Partition Assistant, Click "Disk Defrag" or right click on the disk and select "Disk Defrag".
Step 2: Check the partition that need to be analyzed and click "Analyze". Please note you need to check the partition, not select it.
Because this function currently only supports NTFS partitions, so it will only list NTFS partitions on SSD, HDD and USB drives.
When the analysis begins, you could click "Pause" to pause the process and resume later, or click "Stop" to terminate the process completely.
Step 3: After the analysis is complete, the program will score the analyzed partition based on the fragmentation rate. There are 3 statuses according to the score:
Normal: Score ≥90. The current partition is in good condition, no need for defragmentation.
Suggest to organize: 60≤ Score＜90. The current partition has some fragments, suggest to run the defragmentation.
Organize now: Score＜60. There are many fragments in the current partition, suggest to run the defragmentation immediately.
In addition, you can check the distribution of fragments through the Tetris view.
After the analysis is completed, you can click on "Details" to see more information about the analysis results:
Total files and directories
When the fragment analysis is complete, click the "Defrag" button to start defragmentation.
When the defragmentation begins, you could click "Pause" to pause the process and resume later, or click "Stop" to terminate the process completely.
After the defragmentation is completed, the partition will be scored according to the defragmentation result.
- If you check the partitions and directly click the "Defrag" button without analyzing, it will analyze first and defragment.
- In some cases, there might be some fragmented files that cannot be defragmented. Such as, files in use.
For solid state drives, defragmentation is not recommended, the reasons are as follows:
1. From the principle of disk fragmentation, we can see that the reason that defragmentation can improve computer performance is: by defragmenting disk fragment files, the fragmented files are combined into one, which speeds up the seek time of the disk, thereby accelerating the overall speed of the computer. The storage unit of the SSD is based on the electronic storage of flash memory particles, so the seek time is theoretically eternal, and its performance is only affected by the performance of the main control chip and the process of the flash memory particles.
2. The working mechanism of disk defragmentation is to re-read the files stored on the disk in a certain order and reorganize them. The flash memory storage characteristics of solid-state hard disks determine that the number of erasing and writing is limited. Once the limit is exceeded, the disk cannot be written and will be scrapped. So, defragmentation may reduce SSD lifetime.
3. The TRIM function that comes with the SSD can give full play to the overall read and write performance when it is turned on. In a sense, it has actually acted as a disk defragmentation function.
Our program will show the status of SSD as "Normal", even though there are some fragments. If you check the SSD partition, you will see a pop-up message (as shown below). You can click "Yes", then continue to analyze and defrag. Or click "No" to exit.
The program will save the analysis and defragmentation status for a period of time. when you run the program again, it will retain the last status.
Situation 1: When you defragment partition, it will always show status as "Normal" within 30 days since the last run. Generally, you don’t need to defragment the partition again within 30 days, unless a large number of files have been added or changed.
Situation 2: If you only analyze the partition without defragmentation, the status will be the same as in the last analysis result within 30 days since the last run. For example, the last analysis result is "Suggest to organize", it will always show "Suggest to organize" when you open the program again within 30 days.
You can select if defragment the partition based on the last analysis result.
Situation 3: The last analysis or defragmentation is more than 30 days, regardless of the last analysis result, the status will show "Suggest to organize". That’s to say, if you analyze or defragment partition 30 days before, it is recommended to analyze and defragment the partition again.
- If you check multiple partitions on the same disk to analyze or defragment, they will be analyzed or defragmented one by one.
- If you check multiple partitions on different disks, the program can analyze or defragment partitions on different disks at the same time.
- Defragmentation may take a long time. You could tick the option "Shutdown after defragmentation" to automatically shut down the computer when the defragmentation is completed.