I see with a Samsung SATA Disk (1TB) on a MSI K9N Board in AHCI mode
a huge difference in boot time, at least I couldn't await booting nv110
natively. Booting nv107 still works perfectly fast.

booting nv110 native with the debugger (moddebug/W 8000000, prom_debug/W 1)
shows, that up to driver npe0 everything is fast, once ahci and sata come
into place, it took minutes after loading installing the sata driver to
show up the first SATA disk and minutes later the DVD burner (SATA).

booting Solaris as dom0 under the Xen kernel is fast as usual.

the previously installed nv107 was booting fast as usual natively and
with xen.

how to debug this ?

Thx!
Thomas
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