mirror a GPT partition, what label?

[Koen Smits]

On Thu, Jan 8, 2009 at 21:21, Brooks Davis <brooks at freebsd.org> wrote:

> On Thu, Jan 08, 2009 at 08:35:25PM +0100, Koen Smits wrote:
> > Hi,
> >
> > My new NAS will have the following disk layout:
> > ad0 -> 2gb CF
> > ad4 -> 1TB WD Green
> > ad6 -> 1TB WD Green
> >
> > The CF will boot the rig, the 2 1TB disks will be mirrored with ZFS. No
> > problem there, did it before.
> > The problem lies in the swap space, which I want to place at the first
> > gigabyte of the 1TB disks. The disks will use GPT layout. I want to
> gmirror
> > the first 1GB partition on both disks. How should I accomplish this? Is
> it
> > sufficient to label both partitions 'freebsd'? According to man 8 gpart
> > 'freebsd' should not be used when using GPT. Any insight would be
> > appreciated.
>
> gmirror shouldn't care what the underlying type is though using freebsd
> may confuse future tools that expect to find a bsdlabel on the partition.
> That being said, I'd be pretty surprised if mirroring your swap
> partition did anything other than causing pain and preventing coredumps.
> You can have quite a number of swap partitions so why not just add both
> and have twice as much (plus the chance to successfully produce a core
> dump if you need to debug something).
>
> -- Brooks
>

Well, the theory was that if I lose a disk, the system wouldn't go flat on
its face because the swap space suddenly disappeared.
So there is no recommended procedure for using GPT partitions for
gmirror/gstripe?