UFS There is a discrepancy between the amount of starting size and the space left on the disk after the creation of the UFS2 partition.

[Cath O'Deray]

In single user mode, is the root filesystem not mounted? …

In single user mode, it is (by default) not writeable. Things can be changed with tunefs, and so on.

Bonus: <https://forums.freebsd.org/posts/556568> – education thanks to SirDice

… if you can unmount the filesystem while in multiuser mode, …

Not possible for the root filesystem, but you can:

1. shutdown now
2. choose your shell for single user mode.

 

[ZioMario]

ziomario I think that would work.

what would work ? I've moved datas from the 2 TB disk elsewhere and I've copied the large file (913 GB) on that disk. This is the img / raw file of the operating systems installed on the nvme disk (windows and ubuntu),because I want to work on a workaround for booting "physically" those OSes while I'm using freebsd with bhyve.

 

[mer]

NomadBSD live image should let you boot into the live image on USB, then do the commands to disable journalling on the the filesystem you are trying to work with.

 

[ZioMario]

I've already disabled journaling with the command tunefs -j disable /dev/da3p2 (with the partition unmounted), but since it is not recommended, I gave up the idea and now I'm using a larger disk.