[CentOS] RAID 5 setup?

Boris Epstein borepstein at gmail.com
Thu Mar 25 22:43:17 UTC 2010


On Thu, Mar 25, 2010 at 5:27 PM, Hakan Koseoglu <hakan at koseoglu.org> wrote:
> On Thu, Mar 25, 2010 at 9:07 PM, Boris Epstein <borepstein at gmail.com> wrote:
>>> Note: RAID5 is not really recomended for such large disks.  You run the
>>> risk of a complete data loss if one disk fails and the another disk
>>> fails during the rebuild.
>> Why is the size a factor here? Why would this be OK with smaller
>> disks? How would you partition this instead?
> As the disks get bigger, rebuild time also increases and the
> performance of the disks don't increase linearly with their storage.
> This means that when you are rebuilding a disk, the chances of one of
> your other disks failing becomes significantly large. Most suggest
> RAID6 these days as a minimum, mirroring and striping appears to be
> the most popular.
>
> --
> Hakan (m1fcj) - http://www.hititgunesi.org
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Hakan,

You surely do have a point there. However, it is still not all that
likely that a disk will fail during the rebuild time in question (what
are we talking? some hours max?)

Boris.


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