Re: HELP.. how to remove a spare drive i accidently added

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On Tuesday November 18, jim@jimtreats.com wrote:
> 
> mdadm -D revealed this
> 
.....
> 
>     Number   Major   Minor   RaidDevice State
>        0      33        1        0      active sync   /dev/hde1
>        1       0        0        1      faulty removed
>        2      34        1        2      spare   /dev/hdg1
>            UUID : f3be955c:8902d2ea:fb455a5e:8ea38b70
>          Events : 0.24
> 
> It didn't really shout out to me that the spare drive was being used to
> restore.. 

Good point.  I will try to put is something like "spare-rebuilding",
though it is not actually possible to tell form user-space which
spare is being rebuilt.

> I did in panic go to the FAQ and follow their advice of
> "raidhotadd /dev/mdX /dev/sdX" but this failed as it was already in use as
> spare..
> 
> So could someone point out what to do when my harddrive really does fail...
> take out the faulty one.. put a new one in, partition it.. and then add it
> with
> 
> mdadm -a /dev/md0 /dev/<harddisk>
> 
> this will add it with spare and is equivelant to raidhotadd so will start
> syncing the drive in!?

Yes, this is completely correct.

NeilBrown
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