Corrupted USB Drive - Unable to Partition. External Disk not recognized, cant unmount, cannot erase. Cannot Unmount Mac OS X Base System Disk. See Repair a disk in a mirrored disk set. I want to erase a disk (Mac system) to resize OS X Mountain Lion to the max volume but I couldnt resize it nor unmount the other disk. After you replace the damaged disk, you need to add the new disk as a disk set member and rebuild it. If you have a persistent problem with a disk in a mirrored RAID set: You may need to replace it. Be sure to back up the disks in your RAID set and other data regularly. If you’re using a striped RAID set: Delete the damaged RAID set. NAME: The name of the newly erased disks new partition. You can replace it with any other filesystem, such as JHFS+ or FAT16. FAT32: The filesystem format you want to use. As youre using different methods of connecting the disk currently, it is difficult to know if it could be a hardware issue or not. I would suggest trying to connect the disk using the exact same adapter to another PC/Mac and see if that works. The problem could also be of a hardware nature. eraseDisk: Tells diskutil to erase a disk. Use Disk Utility first to find the actual disk number. See Repair a disk in a mirrored disk set. Here is an explanation of the command: diskutil: This is a disk management tool provided by Apple. If you’re using a mirrored RAID set: Disconnect the disk and then reconnect it. If you think it’s a problem with your Mac or Disk Utility: Quit and reopen Disk Utility or restart your Mac, then open Disk Utility again and check the RAID set. If you receive an alert message that a disk is missing or has failed: Use First Aid to repair the RAID set. If you’re using a USB disk, you may need to disconnect and reconnect it. If a disk is missing: Make sure it’s connected to a power source, turned on, and connected to your computer. If you get a message on your Mac that says a disk is missing or has failed, there are several things you can try to solve the problem. In Terminal, diskutil mount TTSS\ 8 also fails to mountīut, strangely, diskutil mount disk6s1 succeeds (but not the AppleScript version.If a disk in a disk set on Mac fails or is missing Three of these four now mount along with the others, but the 4th one, TTSS 8 = disk6s1, still won’t mount. Then attempt to erase or partition the external disk again. I just replaced the unsuccessful devices in the list with their device node names: disk6s3, disk6s2, disk6s1, and disk 9s4. If you still cant unmount the disk on Mac, you can force unmount the drive in Terminal. Is there anything else I can do to troubleshoot this? Same for the unsuccessful ones: some enabled, some disabled. I also looked at “owners”, but some of the successful mounts have them enabled, others have them disabled. You can only reset the PRAM/NVRAM on a Mac with an Intel processor. You can do this with the following procedures. I can find no attribute that distinguishes those that mount from those that don’t.ģ of the ones that don’t mount are APFS Sys volumes and the other is an APFS physical volume.ġ of the successesful ones is an APFS Sys volume, 4 are APFS physical volumes, and 2 are USB External volumes. 1 Run diskutil eject disk2s2 Repeat that and sudo fuser -c /dev/disk2s2 to kill or quit any processes that are blocking the eject. In some cases where an external hard drive is not mounting on a Mac, it may be helpful to reset the PRAM/NVRAM and the SMC. But…ħ of the disks always successfully mount, 4 of them never mount (using the script). I have been using this script since, maybe, Mountain Lion, so nothing has changed since I upgraded my computer to Big Sur. I am using the script from this thread inside of a loop to mount disks.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |