If not, please see solution 5. It was taking me 20 minutes to close all the errors. Copyright © 2020 MiniTool® Software Limited, All Rights Reserved. If unexpected unmountings continue, try to make a backup immediately. We have found the causes and solutions for you. Tech support from Caldigit confirmed that this is an OSX issue: “Unfortunately the issue exists because of changes Apple made to OS X. Apple no longer manufactures computers with physical PCIe cards so the newer OS X versions are designed to cut power to the PCIe slots when put to sleep. In this situation, you will need a data recovery software to recover the data on it, and then fix this problem. This issue can be caused due to an issue in the physical port or due to corrupt drivers. Connect with us for giveaways, exclusive promotions and latest news. Related links: Then use the Verify Disk option in the First Aid tab to check the drive for errors. ... attached to my hub would disconnect and reconnect, whether they be USB drives or Hard drives. Her articles mainly cover the fields of data recovery including storage media data recovery and phone data recovery, YouTube videos download, partition management, and video conversions. Now, you may want to know: what can this software do for you? If you have any questions when you are using MiniTool software, you can send an email to [email protected], or you can leave a message in the following comment area. Right now it appears to be running okay, but I just wanted to verify this issue right now on my computer. It has me totally confused and I couldn’t even ‘find’ the device even though I disconnected it from the Mac and mains then reconnected it. The problem has never occurred until today, which happens to be the hottest day I can recall. My experience has been the simultaneous random ejecting of the flash card message of improper ejection along with a message that the card has been mounted successfully! But can it cause problems with the computer as well, such as with the file directory? If you think the drive is fine and the case is a problem, you may be able to swap the drive into another case to test. Since you're going to recover data from the external hard drive, run EaseUS Data Recovery Wizard and under the External Devices tab, choose the exact drive where you lost data. Generic cases are also available and are usually less expensive than brand-name enclosures, though they provide fewer connectivity options. Six external drives running without problems under Mavericks. The other craziness is EVERYtime I reboot my machine, my 2 externally connected monitors (27″ Dell monitor via HDMI and a 19″ samsung via a thunderbolt to DVI adapter) show black, while the laptop screen shows the desktop background with no login prompt. To check hard drive errors in Windows 10. Click Scan. Step 4: When the scanning process is finished, you will see the existing and lost & deleted files for you. There are two NASs and half a dozen computers, tablets, and phones on my network. This is not the solution: do the few disk utilities that remain on Captain Crunch, move the data off a 3TB disk, reformat the disk, put the data back, change all the cables, reconfigure the iMac so the data and power cables aren’t within six inches, and you’ll get the same problem because that makes a good column but is not the solution. To do this, you need to open the Device Manager, and then find the target USB Root Hub. Note: When you purchase something after clicking links in our articles, we may earn a small commission. If the files with original file names and folder structures cannot be opened, one possible reason is the corrupted directory info. If you are subject to data loss, try EaseUS Data Recovery Wizard for full hard drive data recovery. The only way out at that point is to yank the USB 3 connection at which time the “improperly disconnected message” pops up and I can reconnect and go about my business. You can preview the file by double-clicking on it. By Glenn Fleishman, Macworld If this external hard drive keeps disconnecting issue still appears after you connect the external hard drive to your computer via USB 2.0, you can try solution 2. Then, you need to select the files you want to recover from the external hard disk with connection issue. Checking the drive with Disk Utility is always a good thing to do. In this situation, you can change the setting in Device Manager. Uninstall drive management tools and drivers. if my theory about the problem being a bug in the code is right, connecting through any other brand’s Thunderbolt hub/dock (CalDigit or Belkin, etc.) In this post, we will take MiniTool Power Data Recovery Personal Deluxe as an example. WD External Drives. Therefore, try adding the drive to Spotlight’s Privacy list and ensuring it is listed in Time Machine’s exclusion list (available by clicking the Options button in the Time Machine system preferences). This happened to me recently when a Western Digital My Passport Studio drive failed. At last, you might be able to fix the hard drive disconnecting and reconnecting issue on your computer through checking and repairing hard drive bad sectors. I don’t think I saw any instance in which a spontaneous ejection occurred before reaching about the 200 Gbyte mark during a single copy. Now, you will learn the secrets to fixing 'hard drive not showing up' issue and to effectively recovering data from drive not showing up, etc. This software offers 4 modules, and it includes: This PC, Removable Disk Drive, Hard Disk Drive and CD/DVD Drive. It always occurs when waking the system from sleep in Mountain Lion, Mavericks, and Yosemite. Do you know how to solve this issue? Be sure to do this for all power profiles (Battery, Power Adapter, etc.). In my experience the Mac Finder warning “Disk Not Ejected Properly” arises due to lack of full compatibility of the external device. That HD was NOT connected to the HUB but to my makeshift extension running straight into the Mac. So, in the next two parts, we will emphasize these two aspects. I have 1 drive that is partitioned into 3. I can still see the mounted drive in Finder but when I click on it it appears empty. I am running Yosemite (10.10.5) on a mid-2012 MBP. 8.1 or 7, the built-in check tool is a good choice. External hard drive keeps disconnecting when copying or transferring. Your country* So, that is a hardware problem of the external device. Device Manager System and Security> Power Options> Power saver> Change plan settings> Change advanced power settings> USB settings> OK, – Prevent PC from Turning off Mass Storage Device. Have you ever encountered external hard drive keeps disconnecting and reconnecting issue? You may need to call the company or use online tech support to get additional troubleshooting. 32 thoughts on “ Tackle external hard drives randomly ejecting in OS X ” HaX June 1, 2015 at 7:07 am. Utter Rubbish. If you want to recover data from an external hard drive which is bothered by connection issue, you can try to data recovery software “MiniTool Power Data Recovery” (current version is V8.0). It has two external drives (Firewire through an Apple Thunderbolt adapter), a network share mounted over ethernet, and a device that is not a drive. Let's now focus on the workarounds, which most of the cases in the following could apply. The company may be able to send you free or for a small fee a replacement adapter if it thinks that’s the problem. EaseUS Data Recovery Wizard is a free data recovery program that is universally applied for retrieving lost & inaccessible data under "external hard drive disconnecting/reconnecting' issues. In this situation, you will need a piece of data recovery software to rescue the data on it, and then take measures to fix this problem. If external hard drive keeps disconnecting issue still exists after you try the above four methods, you need to consider installing the newest USB 3.0 controller drivers. Every one has its partisans and its detractors. 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