From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piergiorgio Sartor Subject: Re: RAID-10 with mixed block size HDDs Date: Tue, 26 Mar 2013 20:05:51 +0100 Message-ID: <20130326190551.GA2277@lazy.lzy> References: <20130325180458.GA4833@lazy.lzy> <0619B2C8-EEFF-4B58-BF5E-A4ACA7A501AE@colorremedies.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <0619B2C8-EEFF-4B58-BF5E-A4ACA7A501AE@colorremedies.com> Sender: linux-raid-owner@vger.kernel.org To: Chris Murphy Cc: Piergiorgio Sartor , linux-raid@vger.kernel.org List-Id: linux-raid.ids On Mon, Mar 25, 2013 at 05:09:00PM -0600, Chris Murphy wrote: > > On Mar 25, 2013, at 12:04 PM, Piergiorgio Sartor wrote: > > > Hi all, > > > > I've a two disk RAID-10 (far 2, I guess). > > One HDD seems to be going to the HDD heaven, > > so I'm planning to change it. > > > > The most convenient HDD I found has 4K sectors, > > while the actual ones have 512 byte sectors. > > It is a 4Kn drive, or a 512e drive? If it's 512e, as long as you add the whole disk or ensure alignment, it's OK. For 4Kn drives, that may be a problem. But so far I've only seen 4Kn drives as large 3+TB external USB. Hi Chris, thanks for the answer. Reading the specs it seems it can emulate the 512, so it should be a 512e. Thanks again, bye, pg > > > Chris Murphy -- piergiorgio