From: Jesper Krogh <jesper@krogh.cc>
To: pgsql-performance@postgresql.org
Subject: Re: 3ware vs. MegaRAID
Date: Fri, 09 Apr 2010 08:32:38 +0200
Message-ID: <4BBECA06.40602@krogh.cc> (raw)
In-Reply-To: <x2jca24673e1004072044hac4475e8g3a3fefdcda6ebefe@mail.gmail.com>
References: <4BB1FAAF.7050406@wp.pl>
<4BB23254.2040109@2ndquadrant.com>
<4BBB662C.8030102@wp.pl>
<23D26E38-9852-4EB6-9DF9-FCB2EAE1EE6C@richrelevance.com>
<x2jca24673e1004072044hac4475e8g3a3fefdcda6ebefe@mail.gmail.com>
On 2010-04-08 05:44, Dave Crooke wrote:
> For a card level RAID controller, I am a big fan of the LSI 8888, which is
> available in a PCIe riser form factor for blade / 1U servers, and comes with
> 0.5GB of battery backed cache. Full Linux support including mainline kernel
> drivers and command line config tools. Was using these with SAS expanders
> and 48x 1TB SATA-300 spindles per card, and it was pretty (adjective) quick
> for a card-based system ... comparable with a small FC-AL EMC Clariion CX3
> series in fact, just without the redundancy.
>
Can someone shed "simple" light on an extremely simple question.
How do you physicallly get 48 drives attached to an LSI that claims to
only have 2 internal and 2 external ports?
(the controller claims to support up to 240 drives).
I'm currently looking at getting a server with space for 8 x 512GB SSDs
running raid5 (or 6) and are looking for an well performing controller
with BBWC for the setup. So I was looking for something like the LSI888ELP.
--
Jesper
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To: pgsql-performance@postgresql.org
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Subject: Re: 3ware vs. MegaRAID
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