On 28/08/2021 14:50, Graham Perrin wrote:
Re: Experiments with sswap(1), srm(1), wipe(1), gdisk(8), lsblk and gpart(8)
<https://www.rodsbooks.com/gdisk/> puts kern.geom.debugflags=16 in context. I'm not sure why it was required yesterday.
The explanation was probably GELI. From the previously attached file:da0p4.eli 0:196 450G zfs - -