0

In MacOS High Sierra's Disk Utility, the partition is listed as Kernel Core Dump Storage (655MB). Its type is Apple_KernelCoreDump in the result of diskutil list. There is also a description, "You can not remove this volume because the previous volume can not be resized." However, if the partition is simply a collection of core dump files, it should be safe to remove the partition.

It does not take too much space but it is in between some free space and the partition I want to increase its size. There is no other easy ways to resize it unless I remove the Apple_KernelCoreDump partition.

partitions in disk utility

Improve this question
4
  • The screenshot is almost useless. Please add the output of sudo gpt -r show disk0. And when apfs is used the output of diskutil ap list.
    – klanomath
    Commented Oct 7, 2017 at 7:44
  • @klanomath The first command results in Operation not permitted and the second command shows something like: <pre> +-- Container disk1 +-< Physical Store disk0s2 +-> Volume disk1s1 (Macintosh HD) +-> Volume disk1s2 (Preboot) +-> Volume disk1s3 (Recovery) +-> Volume disk1s4 (VM) </pre>
    – puri
    Commented Oct 7, 2017 at 8:47
  • By the way, I think the structure of my disk is unrelated to the issue. I just wonder if the kernel core dump partition, which was automatically created by High Sierra, is safe to be removed.
    – puri
    Commented Oct 7, 2017 at 10:31
  • 1
    If a description like "You can not remove this volume because the previous volume can not be resized." is added, the structure of the disk is indeed important...
    – klanomath
    Commented Oct 7, 2017 at 12:24

1 Answer 1

Reset to default
2

I have finally taken the risk to delete Apple_KernelCoreDump partition. I did a full Time Machine backup in an external storage and then rebooted into recovery mode. From the Disk Utility there, I successfully deleted the Apple_KernelCoreDump partition in between two partitions. So far, there have been no problem.

Improve this answer
4
  • did you restart your machine after deleting this partition?
    – dark_ruby
    Commented Jan 3, 2019 at 23:44
  • @dark_ruby To get back into the normal mode, I think a reboot is required
    – puri
    Commented Jan 4, 2019 at 15:23
  • what do you mean "normal mode" ?, did you have to delete partition in "non normal mode" ?
    – dark_ruby
    Commented Jan 5, 2019 at 11:43
  • As I mentioned in my answer, I did it in recovery mode.
    – puri
    Commented Jan 6, 2019 at 8:54

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .