We need to add the following line to have our hard drive mount at boot! /dev/sda1 /mnt ntfs defaults 0 0. You can now reboot your Raspbery Pi, and your Hard Drive will automatically mount! To unmount the drive, simply run the command: sudo umount /mnt. I recently bought a 4 TB naked (no enclosure) external hard drive that I mount via a Newer Tech dock (the ones where you insert the naked drive like bread in a toaster) and is connected to my MacBook pro via FireWire 800. About a month later I wanted to use the drive and it would not mount. Disk Utility reports that it is 'Not Mounted'. External hard drives, thumb drives, USB drives, Flash memory cards, and devices like iPod are examples of storage devices that you can connect to your Mac using Thunderbolt, USB, or FireWire cables, or connect wirelessly using Bluetooth. Storage devices (such as external hard drives) can also be available on your network. Discover the world of external hard drives for Mac. Compare portable, USB and external hard drive models for office and home and shop online.
Unmounting external drives on a Mac is usually done quick and simple by either dragging drive icon to the trash, or by using the eject symbol in a Finder window. Mounting usually happens automatically when a new drive is inserted into a USB port or SD card slot.
However, there is a way to do this via the command line, of which I am a big fan. Fire up a Terminal session and see how to do it.
Listing available drives
To see what's currently attached to your Mac, let's use the diskutil command, followed by the word list. You'll see output like this:
Attached drives are listed with their physical locations on the left (i.e. /dev/disk0, /dev/disk1, etc), as well as with their respective partitions if available on the right (like disk0s1, disk1s2, etc). Make a mental note of the latter: you'll see that we have a physical disk (like disk0), on which several partitions may have been created. It is those partitions we'll mount and unmount, NOT the physical drive.
Unmounting an attached hard drive
On my system I have two internal hard disks (disk0 and disk1), and one external USB drive (disk2). Let's unmount that USB drive now: Download winzip for mac.
Note how we use the unmount command. We need to specify the location of the partition with its full path (i.e. /dev/disk2s1).
Mounting an attached hard drive
To mount the drive again, without having to take it out and plugging it in again, I can issue this command:
Since updating to macOS Catalina, my Seagate 3TB external hard drive is not mounted on Mac. In Disk Utility I cannot do anything but format it which I don't want to do, because there are many important files. Any suggestion to repair unmounted external hard drive or recover data?
When you connect an external hard drive to your Mac, it will show up on Mac Desktop, Finder and Disk Utility. But sometimes the external drive won't show up on any of these places. So, data inside the unmountable external hard drive turns inaccessible.
Don't worry, read and apply the below soluitons to resolve external hard drive not mounting issue.
Unable to mount external hard drive, how to fix it?
There are five solutions to fix external hard drive not mounted issue on your Mac:
1. Change macOS Settings
Hard Drive Not Mounting Mac
Ensure Finder preference to show external disks on Desktop or Finder is enabled.
Step 1: Open Finder from Dock. Click Finder and select Preferences.
How do i unzip on a mac. Step 2: On the 'Finder Preferences' window, click the General tab.
Step 3: Under 'Show these items on the Desktop' section, check 'External disks' option. The external hard drive will show up on your Mac desktop.
Step 4: Click the Sidebar tab. Under 'Locations' section, check 'External disks' option. The external hard drive will show up in Finder sidebar.
Step 5: Open Applications, Utilities and Disk Utility. Click the View menu located at the top left corner of Disk Utility and select 'Show All Devices'. Your Disk Utility's sidebar will show the external hard drive.
2. Fix external hard drive connectivity issue
External Hard Drive Won't Mount Mac
The first thing you can do is to ensure that your external hard drive is connected to your Mac properly. Here are some things you can try:
Reconnect the USB connector or adapter to fit the hard drive snugly
Connect the hard drive to a different USB port or a different Mac
Replace the USB cable or adapter in case that it was damaged or broken
Connect it to a Windows PC and see if the external hard drive is powered on and working
3. Repair unmounted external hard drive with Disk Utility
First Aid is a utility built-in Mac operating system. It can check and repair file system errors on Macintosh HD, external hard drive, USB flash drive, SD memory card, etc,.
Steps to fix external hard drive not mounting issue with First Aid:
Step 1: Open Applications folder, select Utitities and Disk Utility.
Step 2: In the left panel of Disk Utility, select the problematic external hard drive.
Step 3: Click 'First Aid' button in the toolbar of Disk Utility.
Step 4: Click 'Run' button, First Aid will check the volume for errors and then fix the problem if possible.
Wait until the procedure is complete. If you get returned a message saying success, restart your Mac and see if the external hard drive is mounted.
If another message says that disk utility cannot repair the disk, go to solution 4 to recover lost data.
4. Recover data from unmountable external hard drive
M3 Data Recovery for Mac is a professional Mac data recovery software. It can recover lost data from corrupted, unreadble, unmountable external hard drive.
M3 Data Recovery for Mac is fully compatible with macOS Catalina 10.15/10.14/10.13/10.12 and Mac OS X 10.11/10.10/10.9/10.8 and supports APFS, encrypted APFS, HFS, HFS+, exFAT and FAT32 file systems.
Steps to recover data from unmountable external hard drive:
Step 1: Download, install and then launch M3 Data Recovery for Mac on your Mac computer.
Step 2: Select the volume or external hard drive.
Step 3: M3 Data Recovery for Mac is scanning lost data from unmounted external hard drive.
Step 4: After the scan completes, you can check and preview the found files.
M3 Data Recovery for Mac can preview documents, photos and play videos, audios so that you can see if your lost files are recoverable.
Step 5: Select the needed files and click Recover to start recovery.
Computer is missing a firmware partition mac. After data recovery is successfully done, you can reformat this external hard drive and make it working again. Best software to open rar files free.
5. Erase the external hard drive
If this external hard drive doesn't have important data, format is the best choice to make it usage.
Step 1: Open Applicatins folder, select Utilities and select Disk Utility.
Edgeview 2 773. Step 2: Select this external hard drive from Disk Utility sidebar.
Step 3: Click 'Erase' button in the toolbar of Disk Utility. Office for macbook air 2019.
Step 4: Select file system and then click 'Erase' button, the unmountable disk will be working again after erasing.
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