<< Solved >> macOS Catalina - mounting disk ERROR -119930868

[LeoElicker]

What's up guys, I hope you all are fine.

I'm having some trouble while trying to mount my Sata HDD on the Disk Manager, before installing the OS (This disk was previously on my MacBook Pro, but I've swapped for a SSD).

I've previously installed Windows on it, but have cleaned it to NTFS. At the Disk Manager utility, before installing, I've managed to, apparently, erase it to macOS Journaling, which is the Apple recommended format for new installations (found an article on help section).

So, the disk have unmounted itself and now I was not able to mount it anymore. When I try to mount, format ou even part the disk, I've got a different error. In mounting the disk case, the error is (com.apple.DiskManagement.disenter error -119930868) and I'm stuck at that.

Can someone help me?

Thanks!

 

[LeoElicker]

Well, I solved this question myself a few minutes after posting.

What I was trying to do is to erase just one part of the disk, not the entire (didn't knew that this was possible).

So, if anyone get stuck at that, just go to View->Show All Devices and the erase your disk from the root.

That's it, thanks!

 

[mindkindness]

Hello.
My system disk (taken out of the disabled iMac) is not mounting.
It contains softwares that I need to recover. I cannot format it.
(Note: my Time Machine disk crashed shortly before this problem.)
I have the error:
(error -119930868 in com.apple.DiskManagement.dissenter.) Unable to mount "disk6s2".
How did you solve the problem?
Thank you !
[Catalina 10.15.6 (19G73)]

 

[P1LGRIM]

How did you solve the problem?

See Post #2.

So, if anyone get stuck at that, just go to View->Show All Devices and the erase your disk from the root.

 

[mindkindness]

Thank you.
I must not make a mistake. The softwares to be recovered is essential and expensive.
I get in "disk user":
"Show all devices" =
> JMicron Generic DISK03 Media (selectable, SOS = good, GUID partition table with 2TB)
> disk6s2 (in gray)
How to erase the root while keeping the rest safe?

 

[mindkindness]

Thank you Pilgrim-Moderator.
How to "erase your disk from the root" without risking the rest of the contents of the disk? Procedures ?
Only select JMIcron and click "Delete"?
Thank you.

 

[P1LGRIM]

How to "erase your disk from the root" without risking the rest of the contents of the disk?

If your objective is to preserve data then my advice to you would be to not erase anything.
Disconnect the drive.

Install the OS on a new disk and then connect the damaged disk to recover data.
If this fails then there are professional data recovery specialists available who can recover your data for a fee.