gpart: table 'da0' is corrupt; operation not permitted

[aurfalien]

On Jul 16, 2013, at 3:01 PM, Warren Block wrote:

> On Tue, 16 Jul 2013, aurfalien wrote:
> 
>> 
>> On Jul 16, 2013, at 1:50 PM, Michael Sierchio wrote:
>> 
>>> On Tue, Jul 16, 2013 at 1:44 PM, aurfalien <aurfalien at gmail.com> wrote:
>>> 
>>>> Upon doing;
>>>> 
>>>> gpart destroy da0
>>>> 
>>>> I get;
>>>> 
>>>> gpart: Device busy
>>> 
>>> crude but effective:
>>> 
>>> 
>>> DISK=da0
>>> 
>>> offset=`diskinfo $DISK | awk '{ print $4 - 131072 }'`
>>> dd if=/dev/zero of=/dev/$DISK bs=64k count=1
>>> dd if=/dev/zero of=/dev/$DISK bs=64k seek=$offset
>>> 
>>> gpart create -s gpt ${DISK}
>> 
>> This is what I ended up doing.
>> 
>> I unplugged it, waited a few, re plugged and then I was able to delete/destroy.
>> 
>> I will keep your method on hand though as I prefer not doing a hot plug.
> 
> Hot plug?  That just wipes the beginning and end of the disk.  I would erase 1M just to be sure.
> 
> The more elegant version is
> 
>  gpart destroy -F da0

Oh for sure, I did that after the hotplug which finally allowed me to f do it.

I had to hot plug a few times though.


> If it gives an error when doing that, disabling the safety may be necessary:  sysctl kern.geom.debugflags=16
> Do that only when necessary.  It usually is not.

Funny, I did that based on some googling but no dice.

I booted in both regular shel and Live CD.

- aurf