From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from wa-out-1112.google.com ([209.85.146.183]) by bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux)) id 1JXGs0-0005I9-Em for linux-mtd@lists.infradead.org; Thu, 06 Mar 2008 14:14:52 +0000 Received: by wa-out-1112.google.com with SMTP id v33so2165847wah.2 for ; Thu, 06 Mar 2008 06:14:51 -0800 (PST) Message-ID: Date: Thu, 6 Mar 2008 22:14:51 +0800 From: Nancy To: dedekind@infradead.org Subject: Re: UBI: question about ubi_leb_change In-Reply-To: <1204811457.23706.49.camel@sauron> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1204807835.23706.38.camel@sauron> <1204811457.23706.49.camel@sauron> Cc: linux-mtd@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , > But UBI in now way can help you to solve this problem. How could it? > Invent an interface which would help. > > The only way to go is to teach the FS which sits on top of you to inform > you about all blocks which become free when something is deleted. But > the existing FSes do not do this. An yes, this means you'll move garbage > all over the place, which is slow. > > This is why we started UBIFS instead of doing FTL - because we assumed a > native FS should be significantly more efficient then FTL. But Windows do not recognize UBIFS. I have to support VFAT to work on UBI, how can I do? Guess I have nothing to do but suffer the slow time. Now I just want to save a little time, do not read the whole old mapped LEB back, but only necessary pages. The VFAT partitions usuallly use for storing media data (mp3, mp4, avi ....). Only the filesystem meta-data stored area has much chance to be little change. So I needs some functions which I discribe before. I met some problem when I created them. Maybe one more day will be fix, or still can't, if it last too long time still can't fix, hope I can get some help from you if you are free. Thank you :-) --- Best wishes, Nancy