From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-out.bhp.t-online.de ([195.145.119.39] helo=orvill.bhp.t-online.de) by pentafluge.infradead.org with esmtp (Exim 3.22 #1 (Red Hat Linux)) id 18JWRa-0007QO-00 for ; Wed, 04 Dec 2002 10:07:50 +0000 Received: from maria.bhp.t-online.de (maria.ada.t-online.de [172.30.8.41]) by smtp-out.bhp.t-online.de (iPlanet Messaging Server 5.2 (built Feb 21 2002)) with SMTP id <0H6L00JKWC76FA@smtp-out.bhp.t-online.de> for linux-mtd@lists.infradead.org; Wed, 04 Dec 2002 11:37:55 +0100 (MET) Date: Wed, 04 Dec 2002 11:35:55 +0100 From: Thomas Gleixner Subject: Re: IF eraseall will destryed(phys) the nand flash ? In-reply-to: To: shadow Cc: linux-mtd@lists.infradead.org Reply-to: tglx@linutronix.de Message-id: <200212041135.55747.tglx@linutronix.de> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT References: Sender: linux-mtd-admin@lists.infradead.org Errors-To: linux-mtd-admin@lists.infradead.org List-Help: List-Post: List-Subscribe: , List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: On Tuesday 03 December 2002 23:46, shadow wrote: > On Wed, 4 Dec 2002, Thomas Gleixner wrote: > > > Another problem is why the new SMC has some bad blocks and occurred > > > at the same page with using eraseall program erase it. > > > > NAND FLASH can have factory marked bad blocks at shipping time. See > > datasheet. Bad block is bad block and does not go away by erasing it. In > > fact you _MUST NOT_ erase it, as bad block information is lost and > > I don't understand what is shipping time, your meaming is it was > destroyed at the shipping time between the factory to retailer ? Nope, the blocks were bad, when the chip was produced or do you believe that the postman is a heavy source of gamma rays ? :) -- Thomas ____________________________________________________ linutronix - competence in embedded & realtime linux http://www.linutronix.de mail: tglx@linutronix.de