From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-fx0-f222.google.com ([209.85.220.222]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NTkZL-0006wo-Kx for linux-mtd@lists.infradead.org; Sat, 09 Jan 2010 23:18:12 +0000 Received: by fxm22 with SMTP id 22so22922226fxm.2 for ; Sat, 09 Jan 2010 15:18:06 -0800 (PST) Subject: RE: UBI - exclude bootloader blocks from wear levelling From: Artem Bityutskiy To: Darwin Rambo In-Reply-To: References: <4B2FA658.6010407@wyplay.com> Content-Type: text/plain; charset="UTF-8" Date: Sun, 10 Jan 2010 01:18:04 +0200 Message-Id: <1263079084.7315.113.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: "linux-mtd@lists.infradead.org" , twebb , Lauren Del Giudice Reply-To: dedekind1@gmail.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 2009-12-21 at 15:12 -0800, Darwin Rambo wrote: > My understanding is that wear levelling occurs across each ubi device, > and if there were 4 volumes on it, then the wear levelling would be > spread efficiently over the single large device. Then you probably get > better wear levelling than if you had 4 smaller devices and 4 volumes. Right. WL works on UBI device, which corresponds to the attached MTD device. So there is 1-1 mapping between MTD and UBI devices. And each UBI device may contain many volumes. -- Best Regards, Artem Bityutskiy (Артём Битюцкий)