From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1RJVXx-00013Q-NO for garchives@archives.gentoo.org; Thu, 27 Oct 2011 19:23:25 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 7AC0921C09B; Thu, 27 Oct 2011 19:23:12 +0000 (UTC) Received: from mail-bw0-f53.google.com (mail-bw0-f53.google.com [209.85.214.53]) by pigeon.gentoo.org (Postfix) with ESMTP id B3FB021C042 for ; Thu, 27 Oct 2011 19:22:17 +0000 (UTC) Received: by bkbzs8 with SMTP id zs8so74325bkb.40 for ; Thu, 27 Oct 2011 12:22:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=fKRKJoC3/MESAV3iIdIPZ1ZDvbColjuku8UB9jr0cEE=; b=dr1ztk0jbNFc1Rw2PuINwLDZVUOaOG4lNb6kUvLDkEbfmBVKLUI7JVsb4MXvd5NZpr 9npXDGYPana78AWkndqAXtW6JIxWiRgSfriTOklGr2922BcvGW3Qk5os0rIY9IO2jyVG seWljLwI4onvUtBb2a5syCjk9qhDyOttxwuCw= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.204.9.217 with SMTP id m25mr536713bkm.88.1319743336828; Thu, 27 Oct 2011 12:22:16 -0700 (PDT) Received: by 10.204.37.16 with HTTP; Thu, 27 Oct 2011 12:22:16 -0700 (PDT) In-Reply-To: <4EA9A5F7.9050904@gmail.com> References: <4EA9A5F7.9050904@gmail.com> Date: Thu, 27 Oct 2011 15:22:16 -0400 Message-ID: Subject: Re: [gentoo-user] the same hard-drives, different number of sectors... From: Michael Mol To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 X-Archives-Salt: X-Archives-Hash: 6355d24731494df2253c5fbbc7d44118 On Thu, Oct 27, 2011 at 2:41 PM, Jarry wrote: > Hi, perhaps someone could explain this to me: > > I have bouth two the same hard-drives. The same model > (Hitachi HUA722050CLA330), the same firmware (JP20A3EA), > the same size (500GB). Well, not exactly. Both hdparm > and fdisk report different number of sectors (976771055 > versus 976773168). Although not a big difference, yet > I expected them to be exactly the same (want to use > them for raid1). > > So how is it possible they do not have the same number > of sectors? I have bought them from one supplier, even > their serial numbers are very close (only the last 2 > characters out of 24 are different)... Should be fine. The raid implementation will use the smaller of the two for a baseline. As for why, I can only make educated guesses. -- :wq