Sep 08, 2020 • Filed to: Answer Hard Drive Problems • Proven solutions
There are two ways you can install OS X on to your external hard disk: by reinstalling OS X from the OS X Utilities repair screen or by downloading OS X from the App Store and running the installer. We’ll show you both methods in case one isn’t working for you. The easiest way is to download OS X. ? How to fix if my external hard drive is not detected by Mac? Make sure the external hard drive is supplied with power. Try to re-plug the external hard drive if Mac doesn't detect this external HDD. Try another USB port to connect the external hard drive. Try to plug the external hard drive.
Q: How many times have you faced the issue of an unmountable hard disk on your Mac?
I connected my external hard disk of 3TB to my MacBook Air, though it couldn't mount. However, it detected the hard drive when I ran Disk Utility. Is there any way to get back or recover the data from this unmounted disk of my Mac?
Usually, Mac hard drives are partitioned into different sections, also known as logical volumes. It allows you to store a wide variety of data on it separately. The benefit of the partition system is that there is no risk of overloading on the startup disk volume. That allows the boot process to complete without any issues.
There are times when the drive doesn’t mount, preventing your system from starting. It is a critical situation because your data stores on the hard disk, and it is now not accessible. There is also the risk of the data getting lost.
Part 1: Signs & Potential Reasons for an Unmountable Hard Disk
Every time your Mac system boots up, it is going to run a self-test. It is then that the startup disk is mounted, and the files needed for launching the OS gets loaded. Therefore, the startup disk volume must mount appropriately. Otherwise, it may become difficult to access the required data.
As already mentioned, there are many reasons why such a situation arises. Find out the most common reasons here.
It may happen that some type of unexpected error has occurred in your Mac volume. Such errors can make the volume unmountable, preventing the data from showing up. Here are the causes of unmountable hard disks:
If the Mac hard disk is insurmountable, it significantly increases the risks of notable losses in terms of essential files like photos, emails, and work documents. If it happens, you will want to know the ways to recover your unmountable and inaccessible hard disk on Mac and the files stored on it.
Part 2: Symptoms of an Unmountable Hard Drive
Many symptoms may show that your Mac’s hard disk is on the verge of crashing. You should know that the disc is going to unmount if you see the following signs:
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Part 3: Possible Causes
The signs of a hard drive dimming out within Disk Utility can vary from one situation to another. So you should know about these different reasons to be able to determine how to repair the external hard disk that fades within Disk Utility.
Virus or Malware Attack
Once the hard drive has a virus infection, it can cause your system files to get corrupted. It can cause the hard disk to become unmountable. The result is a hard drive that is merely unmountable.
Corruption of File System
The volume data becomes inaccessible to the Mac OS X if there is corruption in the local file system structure. Some of the contributing reasons for file system corruption include erroneous formatting, erroneous re-formatting, or incorrect file system conversion.
Corrupt Volume Header
The volume header is necessary for providing the required data to the operating system. It makes use of header information for mounting a specific volume. Volume can become unmountable when there is a corruption of volume header.
A Hard Drive with Bad Sectors
Bad sectors may also cause an unmounted Mac hard disk. It usually occurs when some type of physical damage happens to the drive. These bad sectors gradually deteriorate and can become entirely useless for storing data. The data stored in this sector will also become difficult to access. Hard drives are known to be highly sensitive to fluctuations in power. So, this can also cause the development of bad sectors. When there are bad sectors, Mac OS X can fail to access the data either partially or entirely.
Operating System Malfunction
The hard drive volume may have become unmountable because the OS crashed.
Sudden Mac Reboot
Your Mac hard drive may also be damaged by the unexpected shutdown of the Mac system. It may happen by an immediate reboot or power failure.
Failure of Disk Utility
You can use the Disk Utility tool for a wide range of tasks, including resizing, file system conversion, and re-partitioning. If an error occurs during these functions, it can render the Mac hard disk volume unmountable.
Part 4: How can You Recover Data from an Unmountable Hard Disk?
It commonly occurs that the external hard disk becomes unmountable and results in data loss. Even the disk utility may not help you repair the unmounted volume. In such a situation, the right step to take is to recover your data from the unmountable drive.
You can recover your files from an unmountable volume on your Mac OS X by downloading and installing the Recoverit Data Recovery tool for Mac. You should then follow these steps to access all the data.
Step 1: Launching Recoverit
Clone Hard Drive Mac Os
Open Recoverit Mac Data Recovery tool. Select the hard drive volume that has the issue of lost data. Click on ‘start.’
Step 2: Scanning
Recoverit data recovery starts scanning to find the lost data from the drive. Give it some time to complete the scanning process.
Step 3: Check and recover files
Once the scanning ends, it becomes possible to check all the recoverable files. You can preview these files on the volume and recover them to a location of your choice.
Part 5: How to Repair Unmountable Hard Drive on Mac?
When you face the problem of unmountable hard drive volume, the first thought that comes to your mind is to use the Disk Utility to recover it. There is a built-in feature in Disk Utility, known as First Aid. It allows you to check volume errors and make attempts to repair them.
However, using First Aid is not a favorable method. Firstly, it is often seen to fail to repair errors at times. Secondly, it is likely to cause damage to the data, making it impossible to recover it.
Method 1: Use Disk Utility
Disk Utility is capable of repairing specific drive issues. You can use it when your Mac volume gives the unmountable error.
Method 2: Formatting
Once the data has been recovered, it is necessary to reformat the drive that had the unmountable error. It will ensure that it starts working correctly again. The steps involved are as follows:
Conclusion
So, your hard drive volume can become unmountable because of reasons like Disk Utility failure, File System corruption, and Mac OS issues. If you have this issue, it is essential to recover data from such a drive at the earliest.
Using Recoverit Data Recovery software allows you to recover the data from your unmountable Mac hard disk in just minutes. It is a sophisticated hard disk file recovery tool for Mac. It has advanced data recovery features, yet it is easy to use for getting your data back from a drive that has been rendered unmountable.
What's Wrong with Drive
Summary
Is your external hard drive running slow when open or transfer files on Mac? You need to follow tips here to fix slow external hard drive on Mac and improve the slow Mac external hard drive performance, at the same time, protect important data from being corrupted or inaccessible on the slower and slower external hard drive with EaseUS Data Recovery Wizard for Mac.
Help! External hard drive becomes incredibly slow after High Sierra update
'I'm experiencing a very slow external HDD since the High Sierra update on my iMac. As soon as I connect it and want to browse, it freezes a lot, takes an age to load contents and open files. I left it for several hours and reconnect it but it still won't work properly. Now, it warns me that it's inaccessible and needs format.'
Batim chapter 1-5 download mac. Are you facing the same issue that the external hard drive becomes very slow suddenly for no reason? To speed up a very slow external hard drive on Mac and improve its performance without losing data, you are arriving at the right place.
How to Recover Data from Slower and Slower External Hard Drive
First of all, you must need a Mac data recovery program to extract data from an inaccessible external hard drive on your Mac after it's getting slower and slower. And, don't format the drive before a complete data recovery if the error message appears and says it needs to be formatted before you can use it.
To safely export data from a slow external hard drive on Mac, download EaseUS Mac drive recovery software and follow the three steps.
Step 1. Select the disk location (it can be an internal HDD/SSD or a removable storage device) where you lost data and files. Click the Scan button.
Mac Os Hard Drive Icon
Step 2. EaseUS Data Recovery Wizard for Mac will immediately scan your selected disk volume and display the scanning results on the left pane.
Step 3. In the scan results, select the file(s) and click Recover Now button to have them back. https://rainbowtree453.weebly.com/blog/adobe-flash-cc-2015-download-mac.
How to Fix a Slow External Hard Drive on Mac OS X?
For your information, many factors would affect the performance of an external hard drive on Mac OS X and decrease its speed in file transfer or hard drive loading. The following are some examples.
Next, you are going to grasp the unique solutions this page provides and quickly solve the problem of a slow external hard drive on Mac after transferring all your data files to a safe place with EaseUS Data Recovery Wizard for Mac.
Solution 1. Clean up useless duplicated files from Mac external hard drive with Mac cleanup software
Large duplicate files, such as videos, photos and music take a considerable amount of disk space, and the accumulative garbage will make your Mac har drive run slower and slower. So, to increase the external hard drive speed on Mac, the primary action you need to take is to clean up all the duplicate files in order to free up some disk space.
Here, we recommend you EaseUS CleanGenius, the best Mac speedup software for you to deal with a burdensome Mac external hard drive.
Step 1. Launch EaseUS CleanGenius and click on Duplicate Finder;
Drag and drop folders to scan or click Folder icon to add folder for finding duplicate files; Hard Drive Repair Mac Osx Downloads
Step 2. Select target folder and click Open so to scan and find duplicate files;
External Hard Drive Mac Os
Step 3. Right-click found file and select View to identify which one is the file that you want to keep;
Select unwanted duplicate files and click Delete to remove from Mac. Solution 2. Repair Disk Utility to resolve the slow external drive problem
Many users don't know that repairing the Mac Disk Utility would help improve the performance of a slow external hard drive, and it's also worth your try immediately.
Step 1. Press down the Command + S keys to boot your Mac computer into the single-user mode.
Step 2. Type the behind command: fsck -fy Step 3. After the fsck command, you will receive a message 'file-system modified'. Step 4. Now reboot the Mac to continue the repairing process. Hard Drive Repair MacOther Mac external hard drive speedup tips
1. Activity Monitor Lookup: Watching and monitoring a close look at the Mac activity monitor can sometimes help in improving the slow running external drive performance.
2. Proper StartUp items management: When you start a Mac, too many icons starts automatically in the Mac OS background. Properly managing the StartUp items can also helpful in improving the slow external drive performance.
3. Visual effects Turning Off: Turning off the visual effects on Mac OS can also useful in improving the performance of an external drive.
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