From mboxrd@z Thu Jan 1 00:00:00 1970 From: adfas asd Subject: Re: Is My Data DESTROYED?! Date: Sun, 25 Oct 2009 08:47:54 -0700 (PDT) Message-ID: <56508.9205.qm@web38802.mail.mud.yahoo.com> References: <20091025133858.GA23319@boogie.lpds.sztaki.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <20091025133858.GA23319@boogie.lpds.sztaki.hu> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids --- On Sun, 10/25/09, Gabor Gombas wrote: > > I am shocked at all who think that human error is so > prevalent, and in > > fact obviates the case for RAID as backup. I've > run Debian for 12 > > years on all my personal servers and remember > literally only 3 or 4 > > cases in that time where I muggered something up and > had to go to > > backup. There must be alot of fsckups out > there... > > Again, RAID is _not_ backup. "Backup" is something that can > retrieve a > file if you've deleted it or if you've accidentally > overwritten it. RAID > cannot do that. You are not understanding the words what are coming out of my mouf... > > Now a backup by cron is nice and all, but what if it > silently fails in > > some obscure way? > > There are a couple of golden rules about backups. One such > rule is that > you should check at regular intervals that your backup is > intact, LOL For terabytes? Get real. > > This is one thing I like about RAID or ZFS, it lets > > you know when anything's wrong. > > No. They let you know when a limited set of errors > conditions occur. > Neither RAID nor ZFS will complain if you delete the wrong > file or if > you accidentally overwrite the show you've recorded > yesterday. A good > backup solution protects you from both. Again, you are not understanding.