returning to 8.2 from 9.0

Johan Hendriks joh.hendriks at
Sat Sep 10 19:10:39 UTC 2011

Fbsd8 schreef:
> Have test pc. Been running 8.2 just fine. Installed 9.0 from cd and 
> after playing around tried to reinstall 8.2. Got error about GTP table 
> while trying to setup the HD. Used 8.0 livecd to
> "dd if=/del/zero of=/dev/ad0 count=5 to wipe the start of the HD clean.
> Now 8.2 install issues this msg
> GEOM: ad0: the primary GPT table is corrupt or invalid.
> How do I fix the HD so 8.2 will install?
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maybe this little script helps you.

It helped me in several situations.

If that does not do the job, you could try dban disknuke that will wipe 
the disk completely

Johan Hendriks

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