3 disks configured RAID 0 over 10 disks configured in RAID 5 (self replicating SAN)

From: Rene Romero Benavides <rene(dot)romero(dot)b(at)gmail(dot)com>
To: pgsql-admin(at)postgresql(dot)org
Subject: 3 disks configured RAID 0 over 10 disks configured in RAID 5 (self replicating SAN)
Date: 2013-08-27 22:33:04
Message-ID: CANaGW0_n86g5WAV4zEabYoSkg1GSdXT6CpYqtBsN2NMr==rG8g@mail.gmail.com
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Thanks for your attention.
What would you choose for a postgresql installation: 3 disks configured
with RAID 0 (in a self replicating SAN) over 10 disks configured with RAID
5 (also in a self replicating SAN) , we have space constraints that
prohibit us from choosing RAID 1+0.
I've been persuaded to choose RAID 5, because writes and parity computation
will be spread over 10 disks compensating write overhead providing a better
level of data security.

Do you think it was a good decision? Any comment will be appreciated. Have
a good day.

--
El genio es 1% inspiración y 99% transpiración.
Thomas Alva Edison
http://pglearn.blogspot.mx/

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