ZFS pool cheating

[Bob Bishop]

Hi,

On 20 Nov 2013, at 16:47, Jan Dušátko <jan at dusatko.org> wrote:

> Dear,
> Do you someone know method, how can be pool converted from concatenating to
> regular mirror? By mistake I replaced failed disk in pool using add not
> replace, which caused me to change pool configuration.
> I looking method allow me to have pool online during whole replacement
> procedure.

If you can connect two extra disks, you can make a concatenated mirror. If you can do that without a reboot you can do the whole procedure online.

With existing disks d1,d2 and new disks d3 at least as big as d1, d4 at least as big as d2:

zpool attach <pool> d1 d3
zpool attach <pool> d2 d4

Otherwise I think you are in for some downtime.

> Regards
> 
> Jan
> 
> 
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--
Bob Bishop
rb at gid.co.uk