"unknown special file or file system"įYI Diskutil list shows this in case I picking the wrong disk in previous stepĢ: Apple_APFS Container disk1 500.1 GB disk0s2Ġ: APFS Container Scheme - 500.1 GB disk1ġ: APFS Volume HD - Data 152.9 GB disk1s1Ģ: APFS Volume Preboot 282.2 MB disk1s2ģ: APFS Volume Recovery 622.1 MB disk1s3Ħ: APFS Snapshot .update-. 15. When I enter that command I get the following error. That means that you dont want to create a new session object for every attempt to unmount a disk. Next make it writable which will require you to enter your password - the /Volumes/Macintosh\ HD\ 1 could be different. The only issue is I can't get past step 3. I have researched this issue extensively and have decided on following the guide listed here () and accept the risks. My MacBook Air has come to a crawl because the kernel_task is running at 100% . Kernel_task running 100% which is throttling the MacBook Air Thanks in advance for any and all help. ** The volume A was formatted by diskmanagementd (1412.101.1) and last modifiedįsck_apfs completed at Sat May 23 19:56:53 2020 I made the partition but the wrong format, so i removed it through boot camp assistant and created another, except now it keeps giving me the 'back up the disk and use disk utility to format it as a single Mac OS Extended (Journaled) volume. Select the storage device (not the partition) and click the Erase button at the top of the window. Click the View button on the top left corner of the Disk Utility window and click Show All Devices. :Įrror: failed to read container superblock Open Disk Utility by using Spotlight Search (CMD Space) or by opening Finder > Applications > Utilities > Disk Utility app. Once Terminal has successfully created the bootable disk, simply unmount the USB from the. Now it doesn't mount and 'fsck_apfs -y -x /dev/rdisk3s1' is run without succes. Hence, Apple does not include Boot Camp Assistant on M1 Macs. Also, you want to keep a reference to the session object so that you can unschedule and release it when you no longer need it (which would be sometime after you no longer need to get callbacks from it).APFS Failed to read superblock, desperate call for help:) Stupidly forgot to unmount and pulled out the USB of my HDD with APFS. That means that you don't want to create a new session object for every attempt to unmount a disk. You use either DASessionScheduleWithRunLoop() or DASessionSetDispatchQueue(), as described in Disk Arbitration Programming Guide: Using Disk Arbitration Notification and Approval Callbacks – Scheduling the Session with the Run Loop or Dispatch Queue. You need to schedule the session object on a run loop or dispatch queue. Note or copy the name of the disk you want to unmount. Press Return to see the list of connected disks. Type diskutil list in the Terminal window. The session object is responsible for managing this waiting and calling. To unmount a disk in Terminal: Open Terminal in Applications > Utilities or choose Terminal from Utilities in Recovery Mode. The mechanism by which a program waits for that event and calls your callback in response is either a run loop or a dispatch queue. Your callback will be called at that time. 3 I cant test it but I think that if you erase the MBR (with dd instead of fdisk) and the partition table record you should be able to re-format you ssd. If it succeeds, it may happen at some later time. The disk has not necessarily been unmounted by the time the function returns to your code. ĭASessionUnscheduleFromRunLoop(_session, getCFRunLoop], kCFRunLoopDefaultMode) ĭADiskUnmount() operates asynchronously. (void)umnountDrivePath:(NSString *)voulumePathĭADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, ssion, path) ĭADiskUnmount(disk, kDADiskUnmountOptionDefault, unmount_done, (_bridge void *)(self)) ĭriverUtilitiesController *driverUtilitiesController = (_bridge DriverUtilitiesController *)context ssion = DASessionCreate(kCFAllocatorDefault) ĭASessionScheduleWithRunLoop(_session, getCFRunLoop], kCFRunLoopDefaultMode) Thanks to Ken Thomases the code now works - (id)init Void (void)umnountDrivePath:(NSString *)voulumePathĭASessionRef session = DASessionCreate(kCFAllocatorDefault) ĬFURLRef path = CFURLCreateWithString(NULL, (_bridge CFStringRef)voulumePath, NULL) ĭADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, session, path) ĭADiskUnmount(disk, kDADiskUnmountOptionDefault, unmount_done, NULL) Could someone give me a help? DriverUtilitiesController() I read the DiskArbitrationProgGuide and followed the steps, but no progress yet. The code works fine, but the callback is not called when the disk is unmounted successful only when it gives an error.
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