From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: detection/correction of corruption with raid6 Date: Wed, 17 Dec 2008 09:48:55 -0500 Message-ID: <49491157.9060805@tmr.com> References: <1229464713.6159.16.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1229464713.6159.16.camel@localhost.localdomain> Sender: linux-raid-owner@vger.kernel.org To: Piergiorgio Sartor Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Piergiorgio Sartor wrote: > Why a RAID system might have inconsistencies? > Why do we have a "check" command at all, to run weekly or monthly? > Because alpha particles fly by, most systems don't have ECC memory, a passing truck and noisy jet create a beat frequency that causes a once in a century bit flip on a good cable connection, power line noise creeps in, or maybe an angel farts. My question is why we don't use available techniques to fix this since we have the software to find it for us. -- Bill Davidsen "Woe unto the statesman who makes war without a reason that will still be valid when the war is over..." Otto von Bismark