On Tuesday October 7, Holger.Kiehl@dwd.de wrote:
> On Tue, 7 Oct 2003, Lars Marowsky-Bree wrote:
>
> > On 2003-10-06T16:27:59,
> > Dan Hollis <goemon@anime.net> said:
> >
> > > is it possible to use the single drive as hot-failover for both md0 and
> > > md1?
> >
> > In theory yes, in practice not.
> >
> > One could imagine (rather easily) a global hot-spare pool for all mds,
> > but it's not implemented right now.
> >
> Not sure about this but I thought this would be possible by using mdadm
> in monitor mode? In the manpage of mdadm it says:
>
> As well as reporting events, mdadm may move a spare drive from one
> array to another if they are in the same spare-group and if the desti-
> nation array has a failed drive but not spares.
>
> But I don't know how to create a spare-groupi or what is meant by it?
From "man mdadm"
For mdadm to move spares from one array to another, the different
arrays need to be labelled with the same spare-group in the configura-
tion file. The spare-group name can be any string. It is only neces-
sary that different spare groups use different names.
from "man mdadm.conf"
spare-group=
The value is a textual name for a group of arrays. All
arrays with the same spare-group name are considered to be
part of the same group. The significance of a group of
arrays is that mdadm will, when monitoring the arrays, move
a spare drive from one array in a group to another array in
that group if the first array had a failed or missing drive
but no spare.
does that help?
NeilBrown
>
> Regards,
> Holger
>
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