boot0cfg and gmirror ...

Patrick M. Hausen hausen at
Tue Aug 26 07:47:12 UTC 2008

Hi, all,

> hd30# boot0cfg -s 2 -v /dev/mirror/m0
> boot0cfg: /dev/mirror/m0: Geom not found
> boot0cfg: /dev/mirror/m0: ioctl DIOCSMBR: Operation not permitted

Simple solution: don't use boot0cfg - use fdisk.
I get the bogus (?) "Geom not found" message every time,
but the active partition seems to be updated correctly.

The only dicussion of this topic that I found dates back to

Still not quite sure about possible implications, but
I am happy as long as it works.

Any caveats?

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