From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wakko Warner Subject: Re: Thought about delayed sync Date: Sun, 9 Oct 2011 09:44:54 -0400 Message-ID: <20111009134454.GA2831@animx.eu.org> References: <20111008180309.GA14979@animx.eu.org> <201110081600.44112.thomas@fjellstrom.ca> <20111009120407.GB25344@animx.eu.org> <201110090634.57750.thomas@fjellstrom.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <201110090634.57750.thomas@fjellstrom.ca> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Thomas Fjellstrom wrote: > On October 9, 2011, Wakko Warner wrote: > > On another note, I used this feature to clean the dust out of my disk array > > in another system. Fail a drive, read the array to verify which drive I > > physically failed, remove it, clean the dust off, add it back, wait for > > resync to complete and then do another disk. Resync on that was quick for > > the 750gb member. Without a bitmap, resync time on that system is 3 hours. > > Try it on a 7 1TB drive raid5. fun times. I imagine its much worse with 2, 3 > or 4 TB drives. (though not many people have a bunch of internal 4TB drives I > imagine). Actually, I have, well sort of. I have an 8 drive raid6 (2tb disks). It takes about the same time as a 4 drive raid5 with the same disks. -- Microsoft has beaten Volkswagen's world record. Volkswagen only created 22 million bugs.