[Dovecot] RAID1+md concat+XFS as mailstorage

Charles Marcus CMarcus at Media-Brokers.com
Sun Jul 1 13:48:04 EEST 2012

On 2012-07-01 3:17 AM, Stan Hoeppner <stan at hardwarefreak.com> wrote:
> In a production environment, the mirror pairs will be duplexed across
> two SAS/SATA controllers.
> Duplexing the mirrors makes a concat/RAID1, and a properly configured
> RAID10, inherently more reliable than RAID5 or RAID6, which simply can't
> be protected against controller failure.

Stan, am I correct that this - dual/redundant controllers - is the 
reason that a real SAN is more reliable than just running local storage 
on a mod-high end server?


Best regards,


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