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windles Author

Level 1

8 points

Boot drive omap corruption

Long story short my MacBook freezes because its SSD boot drive gets disconnected during operation. Boots to prohibitory sign. Tried first aid using another Mac, tried fsck using another Mac, but I haven't tried fsck in single user mode booting off the SSD because it won't go to single user mode, instead runs its codes and displays around a couple hundred of these codes:

and then freezes into this:

SSD First aid log:

Running First Aid on “INTEL SS DSC2KW256G8 Media” (disk2)

Checking prerequisites

Checking the partition list

Checking the partition map size

Checking for an EFI system partition

Problems were found with the partition map which might prevent booting

This disk doesn’t contain an EFI system partition. If you want to start up your computer with this disk or include it in a RAID set, back up your data and partition this disk. : (-69767)

Operation failed…

Another "disk" called AppleAPFSMedia which is probably my boot partition, first aid log:

Running First Aid on “AppleAPFSMedia” (disk3)

Fixing damaged partition map.

Invalid disk.

Operation failed…

I need the data on that drive and the programs as well, I wouldn't want to restart everything. I was thinking if it were possible to fix the drive enough so that migration assistant could detect the drive and copy the data.

*Running off temporary external drive with Catalina install. The SSD has Mojave on it.

MacBook Pro 13", macOS 10.14

Posted on Oct 27, 2019 8:26 AM

Top-ranking reply

HWTech

Level 9

60,284 points

Posted on Oct 27, 2019 12:46 PM

Did you replace the laptop's internal hard drive cable when you upgraded to an SSD? Connect the SSD externally and try to boot the laptop. If it boots, then either the internal hard drive cable is defective and needs replaced or you have a compatibility issue between the SSD and the laptop.

It is possible the SSD is failing. Run DriveDX and post the report here using the "Additional Text" icon which looks like a piece of paper. The best way to do this is by booting the troubled laptop using an external drive or by putting another Mac into Target Disk Mode to boot the troubled laptop. If you put the troubled laptop into Target Disk Mode I'm not sure DriveDX will be allowed to communicate with the SSD. You can also remove the SSD and connect it to another system with a USB adapter, but DriveDX will require a special USB driver.

Another method of checking the health of the SSD is by creating a bootable Knoppix Linux USB drive using Etcher (Mac/Windows/Linux). Option Boot the Knoppix USB drive and select the orange icon labeled "EFI". Once at the Knoppix desktop, click on the "Start" menu in the lower left of the Taskbar and navigate to "System Tools --> GSmartControl". Double click on the drive icon within GSmartControl and there should be an option to view and save the report which you can post here using the "Additional Text" icon which looks like a piece of paper. You should also be able to run the SSD's internal self diagnostics using GSmartControl.

If the volume is formatted as APFS and Disk Utility cannot repair it, then your only option may be to contact a professional data recovery service such as Drive Savers or Ontrack both of whom offer free estimates. There are currently no third party utilities available to repair an APFS volume since Apple has not released the required documentation.

Or you can just access your files from a backup. You do backup don't you? If not, this painful lesson will get you started.

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Boot drive omap corruption

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