[CentOS] Suggest Hardware Raid Controller Card

Christopher Chan christopher.chan at bradbury.edu.hk
Tue Jul 12 00:16:59 UTC 2011

----- Original Message ----- 
From: "John R Pierce" <pierce at hogranch.com>
To: <centos at centos.org>
Sent: Tuesday, July 12, 2011 12:34 AM
Subject: Re: [CentOS] Suggest Hardware Raid Controller Card

> On 07/11/11 9:30 AM, Drew wrote:
>> Which is funny because Intel's SASUC8i (rebranded LSI3082E-R) is true
>> hardware RAID which I recently picked up*new*  for $150. They don't do
>> RAID-5/6 or have a BBU but IMO you don't need a BBU for RAID-0/1/10.
> you want BBU (or flash-backed cache) if you want write-back cache, and
> not mandate write-through. This is quite independent of the RAID type.
> It greatly speeds up 'committed' random writes such as are generated by
> a transactional database.

Who needs bbu when you can get an SSD to work with your ext3/ext4 that is 
sitting on an md raid 1/0/nested 1+0/10? 

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