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Question: HDD corrupted after using BootCamp

I've been trying to fix this for a couple of days and have tried to search everywhere will very little progress.


Basically my iMac ran great and I wanted to dual boot with Windows 10. So I followed some good instructions on how to install it using boot camp and everything went great!


Windows ran very well and I was satisfied. So I went back to my mac and instantly the load times were a bit suspect. As soon as I logged in it was horribly slow. I learned it could be because of spotlight indexing.


Long story short now I've erased the boot camp partition using disk utility (now realizing that was a bad thing to do) and erased my main drive and tried to reinstall High Sierra over night. It was stuck on "about a minute remaining" for hours. So I hit restart and it was the same as before. Apple logo with incredibly slow load time then right at the end the spinning reticle and black screen.


Erase the drive and reformat again but it fails at the end saying it cannot be mounted. I can never get a successfull first aid run on either the main drive or new formatted sub drive.


I'm really hoping it's not fried somehow.


Please help

iMac Line (2012 and Later)

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Answer:

Repair macOS Hard Drive with Disk Utility


Steps to repair a failing Mac hard drive are discussed below:


Step 1: Reboot macOS and immediately press-hold Command + R simultaneously.


Step 2: Shortly, you will be booted in the Recovery Mode. Here, you are presented with four options to troubleshoot your Mac. Disk Utility is one of those four options; click Disk Utility to launch.


Step 3: Choose your start-up disk (Macintosh HD) and run First Aid to repair cryptic disk errors on Mac hard drive.


There will be two possible outcomes after the Disk Utility is done repairing the failing Mac drive:


i) Mac start-up disk is repaired successfully with the Disk Utility: When the Disk Utility shows you the output that it has repaired the corrupt disk successfully then you can log-out from the recovery partition and boot into the desktop as you would usually do.


ii) Disk Utility Can’t Repair the Corrupt Start-up Disk Drive!: There are several limitations of the Disk Utility itself such as it can’t repair a corrupt partition map. Also, it can’t repair advance disk errors such as Invalid-B Tree Node. To Repair Invalid B Tree Node on a start-up disk it is required to back up the Mac drive and erase it with a new partition scheme.



Regards,

Adrian


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Question marked as Apple recommended

Sep 19, 2019 1:37 PM in response to xSocialx In response to xSocialx

Repair macOS Hard Drive with Disk Utility


Steps to repair a failing Mac hard drive are discussed below:


Step 1: Reboot macOS and immediately press-hold Command + R simultaneously.


Step 2: Shortly, you will be booted in the Recovery Mode. Here, you are presented with four options to troubleshoot your Mac. Disk Utility is one of those four options; click Disk Utility to launch.


Step 3: Choose your start-up disk (Macintosh HD) and run First Aid to repair cryptic disk errors on Mac hard drive.


There will be two possible outcomes after the Disk Utility is done repairing the failing Mac drive:


i) Mac start-up disk is repaired successfully with the Disk Utility: When the Disk Utility shows you the output that it has repaired the corrupt disk successfully then you can log-out from the recovery partition and boot into the desktop as you would usually do.


ii) Disk Utility Can’t Repair the Corrupt Start-up Disk Drive!: There are several limitations of the Disk Utility itself such as it can’t repair a corrupt partition map. Also, it can’t repair advance disk errors such as Invalid-B Tree Node. To Repair Invalid B Tree Node on a start-up disk it is required to back up the Mac drive and erase it with a new partition scheme.



Regards,

Adrian


Sep 19, 2019 1:37 PM

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Sep 19, 2019 8:00 PM in response to xSocialx In response to xSocialx

Did you erase the whole physical drive so you would only have a single "Macintosh HD" volume? You may need to click on "View" within Disk Utility and select "Show All Devices" before the physical drive will show up in the left pane of Disk Utility.


It sounds like you may have a failing hard drive. Depending on the age of the iMac, you can try running the Apple Diagnostics. If you can boot macOS (internal or externally), then you can run DriveDX to check the health of the hard drive.


If none of these are options, then create a bootable Knoppix Linux USB drive using Etcher (Mac/Windows/Linux). Option Boot the Knoppix USB drive and select the orange icon labeled "EFI". At the Knoppix desktop, click on the "Start" menu on the bottom left of the Taskbar and navigate to "System Tools --> GSmartControl". Within the GSmartControl app, double-click on the iMacs drive icon which will provide you with the health information and attributes for the drive.


Post the report here using the "Additional Text" icon which looks like a piece of paper. If you have multiple drives in the iMac, then post a report for each one.

Sep 19, 2019 8:00 PM

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Question: HDD corrupted after using BootCamp