gmirror, gpart and MBR vs GPT in the Handbook

Warren Block wblock at
Sat Nov 30 21:30:25 UTC 2013

On Sat, 30 Nov 2013, Mike. wrote:

> On 11/30/2013 at 7:07 PM Polytropon wrote:
> |On Sat, 30 Nov 2013 13:03:21 -0500, Mike. wrote:
> |> Is there a specific reason why MBR was used in the Handbook
> |> example for creating a mirror, instead of GPT?   Or was it
> just
> |> a preference of the person who wrote that Handbook page?
> |
> |Refer to this document for a demonstration which is more
> |directed toward GPT:
> |
> |
> |
> |The Handbook's mentioning of MBR, even though commands
> |involved are centered around gpart (instead of the more
> |traditional tools fdisk and bsdlabel) seems to suggest
> |that an update might be indicated. :-)

fdisk and bsdlabel are not needed, gpart does everything they can do.

> Excellent, that site looks to be a very good resource.

That document shows how to mirror GPT partitions, but there are definite 
downsides.  I really should update that article.

At least for now, MBR is still the way to go for mirroring a whole 

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