vimanuelt : Ooh, vimanuelt, looky, looky:
ghostbsd@livecd ~ % gpart show
\=> 34 8292981 da0 GPT (15G) [CORRUPT]
34 25 1 freebsd-boot (13K) ghostbsd@livecd ~ % gpart show
\=> 34 8292981 da0 GPT (15G) [CORRUPT]
34 25 1 freebsd-boot (13K)
59 21 - free - (11K)
80 4096 2 efi (2.0M)
4176 8288839 - free - (4.0G)
\=> 34 8292981 iso9660/GHOSTBSD GPT (15G) [CORRUPT]
34 25 1 freebsd-boot (13K)
59 21 - free - (11K)
80 4096 2 efi (2.0M)
4176 8288839 - free - (4.0G)
\=> 34 8292981 diskid/DISK-0465TD8NDTMBBJFA GPT (15G) [CORRUPT]
34 25 1 freebsd-boot (13K)
59 21 - free - (11K)
80 4096 2 efi (2.0M)
4176 8288839 - free - (4.0G)
\=> 40 500118112 ada0 GPT (238G)
40 512 1 freebsd-boot (256K)
552 494872576 2 freebsd-zfs (236G)
494873128 5234688 3 freebsd-swap (2.5G)
500107816 10336 - free - (5.0M)
59 21 - free - (11K)
80 4096 2 efi (2.0M)
4176 8288839 - free - (4.0G)
\=> 34 8292981 iso9660/GHOSTBSD GPT (15G) [CORRUPT]
34 25 1 freebsd-boot (13K)
59 21 - free - (11K)
80 4096 2 efi (2.0M)
4176 8288839 - free - (4.0G)
\=> 34 8292981 diskid/DISK-0465TD8NDTMBBJFA GPT (15G) [CORRUPT]
34 25 1 freebsd-boot (13K)
59 21 - free - (11K)
80 4096 2 efi (2.0M)
4176 8288839 - free - (4.0G)
\=> 40 500118112 ada0 GPT (238G)
40 512 1 freebsd-boot (256K)
552 494872576 2 freebsd-zfs (236G)
494873128 5234688 3 freebsd-swap (2.5G)
500107816 10336 - free - (5.0M)
So the boot files are corrupt. The download sha256 sum checks out ok, Windows ran initially, and MINT installs and runs fine, so the hardware looks ok. Does Ghost not support this particular NVMe drive? ( SK Hynex SC311 S ) A quick search showed no such difficulty. Or ??
Thanks again for your patient help.