-2

So I have a HDD I want to format to use with my Mac. I think the portion Microsoft basic data is probably some kind of boot drive.

How do i delete it?

This is the return from terminal It’s disk2s2 that I'm struggling to remove

  /dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER 

   0:      GUID_partition_scheme                        *4.0 TB     disk2

   1:                        EFI                         209.7 MB   disk2s1

   2:       Microsoft Basic Data                         -187715584 B  disk2s2

   3:                  Apple_HFS UNTITLED                21.0 MB    disk2s3

   4:                  Apple_HFS UNTITLED                939.5 MB   disk2s4

   5:                  Apple_HFS                         939.5 MB   disk2s5

   6:                  Apple_HFS                         939.5 MB   disk2s6

   7:                  Apple_HFS                         939.5 MB   disk2s7

   8:                  Apple_HFS                         939.5 MB   disk2s8

   9:                  Linux LVM                         4.0 TB     disk2s9

Update.

After attempting to partition the whole disk, this was the results:

QueenC$ diskutil partitionDisk /dev/disk2 1 GPT HFS+ MacintoshHD 100% 
Started partitioning on disk2 Unmounting 
disk Error: -69877: Couldn't open device (Is a disk in use by a storage 
system such as AppleRAID, CoreStorage, or APFS?)
  • 1
    What exactly are you attempting to do? Erase the entire drive or remove a single partition? The text in the question conflicts with the title. Have you tried using Disk Utility (in the Utilities folder)? What were the results? – Allan Jun 25 '18 at 12:12
  • I want to use the drive as an external back up. wanted to remove the partition.yes I’ve tried using disk utility if i formats the whole drive it just sits saying partitioning (i had it for 4 hours first time before i quit) i cannot format the partition either it returns the error (The chosen size is not valid for the chosen file system. Operation failed…) – queenc Jun 25 '18 at 12:18
  • And Ive tried choosing partition the whole disk utility crashes ! – queenc Jun 25 '18 at 12:24
  • 1
    See this answer: apple.stackexchange.com/a/297788/119271 – Allan Jun 25 '18 at 12:30
  • QueenC$ diskutil partitionDisk /dev/disk2 1 GPT HFS+ MacintoshHD 100% Started partitioning on disk2 Unmounting disk Error: -69877: Couldn't open device (Is a disk in use by a storage system such as AppleRAID, CoreStorage, or APFS?) – queenc Jun 25 '18 at 14:38
1
  1. Open Disk Utility from /Applications/Utilities.
  2. Choose View → Show All Devices.
  3. Select your external disk device in the sidebar.
  4. Choose Erase in the toolbar.
  5. Enter a name for the disk and choose a partition type such as Mac OS Extended (Journaled).
  6. Click Erase.
  • have tried sudo diskutil eraseVolume jhfs+ MyVolume disk2, it won’t unmount> then unmounted still the same. – queenc Jun 25 '18 at 12:09

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