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Date:      Thu, 23 Nov 2006 22:24:32 +0000
From:      "N.J. Mann" <njm@njm.f2s.com>
To:        freebsd-questions@freebsd.org
Subject:   How RAID 10 works (was: Re: Password Security)
Message-ID:  <20061123222432.GC34559@ariel.njm.f2s.com>
In-Reply-To: <2cd0a0da0611231408l4a95b0bfo96bb5dfe5187fbbc@mail.gmail.com>
References:  <2cd0a0da0611211941iae07787q3f433fb2c8ab1f22@mail.gmail.com> <20061122163317.GC50939@gizmo.acns.msu.edu> <2cd0a0da0611230056l15bfccaamb3ed3d439e2786b8@mail.gmail.com> <200611230914.kAN9E2GW065034@banyan.cs.ait.ac.th> <2cd0a0da0611230145j3b5f42cfg7b9025236a91e7a3@mail.gmail.com> <20061123082403.b8afea32.wmoran@collaborativefusion.com> <2cd0a0da0611231408l4a95b0bfo96bb5dfe5187fbbc@mail.gmail.com>

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PMFJI

On Thu 23 Nov 23:08, VeeJay wrote:
> Well, I am not an expert on FreeBSD. And thats why I don't know that how it
> works that
> 
> If 4 Disks of same size for example 146GB each and they are configured with
> RAID 10, and Root, SWAP, /usr, /var File systems have been created on them.
> And if one takes one or two harddisks and how come he would be able to read
> the data when data is splited on 4 disks?

With a four disk RAID 10 array you would need two (or more) drives and
it would have to be the right two in order to read _all_ of the data.
See:

http://www.techtutorials.net/tutorials/hardware/raid.shtml

RAID 10 is near the bottom.


Cheers,
       Nick.
-- 
"Elves are wonderful. They provoke wonder.
Elves are marvellous.  They provoke marvels.
Elves are fantastic.  They create fantasies.
Elves are glamorous.  They project glamour.
Elves are enchanting.  They weave enchantment.
Elves are terrific.  They beget terror.
No-one ever said elves are _nice_.
Elves are _bad_."



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