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How to Defrag a Mac and Where did The Data Go?


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What is defragmentation, how to defragment on Mac OS, where is the data going after defragmentation? Can it be recovered?

What is defragmentation?

Disk fragmentation occurs when a file is broken up into pieces to fit on the disk. Because files are constantly being written, deleted and resized, then there are more and more fragments, it is a natural occurrence. The resulting impact of fragmentation is Slow PC performance, long boot-times, random crashes and freeze-ups – even a complete inability to boot up at all. So when a file is spread out over several locations, it takes longer to read and write. Many users blame these problems on the operating system or simply think their computer is "old", when hard disk fragmentation is most often the real culprit.
 
Sometimes, you try to speed up your computer by running disk defragmenter, but caused programs or large files being broken up or fragmented. This is terrible for us, because once the data is lost due to defragmentation, it is hard to recover. Therefore, you can back up existing data and recover lost data before defragmenting the disk.

Will defragmentation harm my HDD?

You may not worry: Mac OS X defrag will not harm your HDD. As you already know, disk defragmentation can greatly speed up the traditional hard drive. It's because HDD fragments all the data and stores it in multiple locations. And it may take quite a time to read the file with its pieces situated in different places. The procedure of arranging the data is not harmful for your HDD and is aimed at boosting the computer's performance. And while it is not advisable to turn to such extreme measures, defragmenting a hard drive disk is a safe procedure if, The only negative comes in the time it takes to perform the defragmentation.

How to recover lost data on Mac OS X?

To recover lost data on Mac OS X in different situations. You should choose a best mac data recover software which can recover lost files from Mac hard drive or other storage device due to deletion, format, virus infection, partition loss, OS reinstallation, etc. All kinds of files can be recovered including photos, documents, audio, videos, archives, download files, etc. Fortunately, Bitwar Data Recovery for Mac can meet all of the above requirements.
 
Download and install Bitwar Data Recovery for Mac on your Mac OS X, and then launch it. The software is compatible with OS X 10.11 and later.
 
Tips: For latest macOS 10.13 (High Sierra) system requirements, Mac users are not allowed an access to system disk from apps. If you want to recover data from the system disk, please disable the system feature "System Integrity Protection (SIP)" , see the guide on How to Disable System Integrity Protection (SIP) in macOS High Sierra (macOS 10.13)

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Step 1: Launch the program and select the partition/devices where your data lost and then click "Next". If you want to recover data from an external storage drive, please connected it to your mac and select it on this step.
 
Step 2: Select the scan mode that based on the exact data loss reasons. Then click "next". There are three scan mode for you choose:
 
● Quick Scan mode can recover deleted files on a partition or device, such as files deleted by command + deleted, emptied from the trash or deleted by other software, etc. If files have not been overwritten by other data, it can be retrieved completely in condition of the files or directory structures.
 
● Formatted recovery: Recover formatted files after performed a quick format on a partition or hard drive in condition of the capacity of partition or drive haven't been changed before or after formatting.
 
● Deep scan: If previous scan couldn't worked to find lost files, try deep scan this time. Deep scan will search every sector of hard drive to find all existing files, but the scanning process will spend more time than quick scan and will not have the original file name in the scanning results.
Defragment

Step3: Choose the file types that you want and click "Next". You can select all types if you do not know which type of files you want be back.
Defragment

Step 4: After scanning, by file name and Type, you can quickly filter the data you want and preview them. Then select the ones you want and press the recover button to have them saved on the Mac.
 
Tips: Please DO NOT save the data into the Partition or device where you lost it from.
Defragment
 
After the above steps, the lost data will be recovered back. Then you can perform to defrag on Mac

How to defrag on mac HDD?

Before starting the Defrag utility, be sure to backup your drive and recover all important data back, close all open files and applications before proceeding. It's important because this will ensure no data is lost in the event of an unforeseen issue. To defragment a disk on mac, follow these steps:
 
Note: It is not recommended to defragment the system disk directly. However, you are required to boot from another computer and defragment the disk.
 
Select the drive from the left of the Drive Genius Window that you'd like to defragment, then select the 'Defragment' utility in the Speedup section of the feature window as shown below:
Defragment
 
Volume Fragmentation will display a graphical representation for a quick overview for the files laid across the volume to indicate how much fragmentation is across the hard drive. Four different colors are displayed to indicate the usage of space:
 
The red portion represents fragmented data, The white portion represents free space, the green portion represents used space that is not fragmented, and the yellow portion is reserved space required by the Mac operating system and can't be defragmented.
 
Click the 'Start' button in the lower right. Confirm that you have a secure backup of all data on the device you will be defragmenting (important to protect against power surges, crashes etc.), and press the 'Defrag' button.
 
During the defragmentation process, if you find that data is lost, you must stop the defragmentation and use Bitwar Data Recovery for Mac to recover the data. Just download and try it.

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