Re: Hardware related question: 3ware 9500S

From: "Merlin Moncure" <mmoncure(at)gmail(dot)com>
To: "Janning Vygen" <vygen(at)gmx(dot)de>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Hardware related question: 3ware 9500S
Date: 2006-04-12 16:31:50
Message-ID: b42b73150604120931h192f72eel505b32fe0d9c4ff2@mail.gmail.com
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On 4/12/06, Janning Vygen <vygen(at)gmx(dot)de> wrote:
> Hi,
> disk 1: OS, tablespace
> disk 2: indices, WAL, Logfiles
> - Does my partitioning make sense?

with raid 10 all four drives will appear as a single physical device
shared by all. I'm personally not a big fan of logical partitioning
of a single raid device unless you are trying to keep a physical
volume under 1 TB for example. Each sync on the volume is guaranteed
to sync all 4 disks regardless of how you set your partitions up.

> - I want to know if 3ware 9500 S is recommended or if its one of those
> controllers which sucks.

escalade is a fairly full featured raid controller for the price.
consider it the ford taurus of raid controllers, it's functional and
practical but not sexy. Their S line is not native sata but operates
over a pata->sata bridge. Stay away from raid 5.

merlin

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