Spares Missing event in case of spare group?

Spares Missing event in case of spare group?

[Jan Ceuleers]

Hi!

I have two RAID1 sets of equal size, with one spare shared between them. 
When I reboot the system I get a Spares Missing notification on one of 
the arrays.

Since this is a false positive, is there a way to avoid it?

Extract from mdadm.conf:

ARRAY /dev/md0 level=raid1 num-devices=2 spares=1 
UUID=19e69537:f7a6aec8:5a5f7576:3fc29e0d spare-group=swapgroup
ARRAY /dev/md1 level=raid1 num-devices=2 spares=1 
UUID=5e728621:c8b356a8:01f8e270:f0e280cb spare-group=swapgroup

Thanks, Jan

Re: Spares Missing event in case of spare group?

[NeilBrown]

On Mon, April 20, 2009 2:02 am, Jan Ceuleers wrote:
> Hi!
>
> I have two RAID1 sets of equal size, with one spare shared between them.
> When I reboot the system I get a Spares Missing notification on one of
> the arrays.
>
> Since this is a false positive, is there a way to avoid it?

Yes.  Remove the "spares=1" from each line.
The sole effect of this text is to tell --monitor to expect a spare, and
to complain if no spare is found.

NeilBrown


>
> Extract from mdadm.conf:
>
> ARRAY /dev/md0 level=raid1 num-devices=2 spares=1
> UUID=19e69537:f7a6aec8:5a5f7576:3fc29e0d spare-group=swapgroup
> ARRAY /dev/md1 level=raid1 num-devices=2 spares=1
> UUID=5e728621:c8b356a8:01f8e270:f0e280cb spare-group=swapgroup
>
> Thanks, Jan
> --
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Re: Spares Missing event in case of spare group?

[Jan Ceuleers]

Neil,

NeilBrown wrote:
> Yes.  Remove the "spares=1" from each line.
> The sole effect of this text is to tell --monitor to expect a spare, and
> to complain if no spare is found.

Many thanks. I hadn't picked that up from the manpage, so here is a 
patch for your consideration:


diff --git a/mdadm.conf.5 b/mdadm.conf.5
index 40295be..b67bec4 100644
--- a/mdadm.conf.5
+++ b/mdadm.conf.5
@@ -135,6 +135,7 @@ this is mainly for compatibility with the output of
  .TP
  .B spares=
  The value is a number of spare devices to expect the array to have.
+The sole use of this keyword and value is as follows:
  .B mdadm \-\-monitor
  will report an array if it is found to have fewer than this number of
  spares when

Re: Spares Missing event in case of spare group?

[Jan Ceuleers]

Jan Ceuleers wrote:
> NeilBrown wrote:
>> Yes.  Remove the "spares=1" from each line.
>> The sole effect of this text is to tell --monitor to expect a spare, and
>> to complain if no spare is found.
> 
> Many thanks. I hadn't picked that up from the manpage, so here is a 
> patch for your consideration:

Reasonable patch?

> diff --git a/mdadm.conf.5 b/mdadm.conf.5
> index 40295be..b67bec4 100644
> --- a/mdadm.conf.5
> +++ b/mdadm.conf.5
> @@ -135,6 +135,7 @@ this is mainly for compatibility with the output of
>  .TP
>  .B spares=
>  The value is a number of spare devices to expect the array to have.
> +The sole use of this keyword and value is as follows:
>  .B mdadm \-\-monitor
>  will report an array if it is found to have fewer than this number of
>  spares when

Thanks, Jan

Re: Spares Missing event in case of spare group?

[Neil Brown]

On Friday May 1, jan.ceuleers@computer.org wrote:
> Jan Ceuleers wrote:
> > NeilBrown wrote:
> >> Yes.  Remove the "spares=1" from each line.
> >> The sole effect of this text is to tell --monitor to expect a spare, and
> >> to complain if no spare is found.
> > 
> > Many thanks. I hadn't picked that up from the manpage, so here is a 
> > patch for your consideration:
> 
> Reasonable patch?

Yes.  Thanks.  (And sorry for the delay :-)

NeilBrown

> 
> > diff --git a/mdadm.conf.5 b/mdadm.conf.5
> > index 40295be..b67bec4 100644
> > --- a/mdadm.conf.5
> > +++ b/mdadm.conf.5
> > @@ -135,6 +135,7 @@ this is mainly for compatibility with the output of
> >  .TP
> >  .B spares=
> >  The value is a number of spare devices to expect the array to have.
> > +The sole use of this keyword and value is as follows:
> >  .B mdadm \-\-monitor
> >  will report an array if it is found to have fewer than this number of
> >  spares when
> 
> Thanks, Jan
> --
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