On Wed, Jul 26, 2023 at 2:22 PM KarlderLetzte <karlderletzte@holnishaus.de> wrote:
hello everybody,

i need some space on disk for a second installation.
therefore i want to safely shrink my fedora installation.

here is the disk layout:
[...]
my question:
is there a safe way to shrink?

The only safe way to shrink is to have a backup.  Shrink is I/O intensive and has
a much higher probability of revealing any weaknesses in hardware or software
than normal operations where weaknesses may remain undiscovered for a long
time.  Also note that running a filesystem with too little free space slows down
file operations and also increases the probability that weaknesses will be revealed.

See: <https://btrfs.readthedocs.io/en/latest/btrfs-filesystem.html#man-filesystem-resize>

--
George N. White III