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Re: Mdadm won't rebuild a RAID5



also sprach Mike Bird <mgb-debian@yosemite.net> [2007.08.20.1627 +0200]:
> > 3) RAID 5 is not resilient against multiple failures.  We now use RAID 1.
> >    RAID 1 is also faster, although it sometimes requires more drives.
> >    In extreme cases we use RAID 1 with three or more drives.
> 
> On Monday 20 August 2007 00:36, martin f krafft wrote:
> > RAID 1 is also not resilient to multiple failures.
> 
> Is the loss of N-1 members of an N-way RAID-1 not survivable?

Well, yes. I see what you mean now. You can survive N-1 harddrives
failing at once while with RAID5, that better not happen before
a spare could take over.

-- 
 .''`.   martin f. krafft <madduck@debian.org>
: :'  :  proud Debian developer, author, administrator, and user
`. `'`   http://people.debian.org/~madduck - http://debiansystem.info
  `-  Debian - when you have better things to do than fixing systems
 
"when faced with a new problem, the wise algorithmist
 will first attempt to classify it as np-complete.
 this will avoid many tears and tantrums as
 algorithm after algorithm fails."
                                                          -- g. niruta

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