From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from msag503.nifty.com ([202.248.238.124]) by casper.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1PR6s7-0000pl-Ks for linux-mtd@lists.infradead.org; Fri, 10 Dec 2010 17:35:08 +0000 Received: from [192.168.24.99] (p3225-ipbfp402wakayama.wakayama.ocn.ne.jp [122.22.125.225]) (authenticated) by msag503.nifty.com with ESMTP id oBAHYshu013870 for ; Sat, 11 Dec 2010 02:34:54 +0900 Message-ID: <4D0264BF.6060904@gmail.com> Date: Sat, 11 Dec 2010 02:34:55 +0900 From: Tarosa MIME-Version: 1.0 To: linux-mtd@lists.infradead.org Subject: Please teach UBI Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hello. Because I do not usually use English, unknown sentences might be written. It is a basic question. UBI is an array of the initial of "Unsorted block images". Please teach the meaning of this "Unsorted block images". Was there a filesystem of "Sorted block images" in the past? What after the filesystem is different as for not sorting block images? Where of UBI is unsorted block images? I do not understand. Please tell me. There are another and a question. It is defined that CONFIG_MTD_UBI_WL_THRESHOLD is 4096. It is thought this is to mean WL is done as difference between a maximum and a minimum of the value of erace counter of PEBs are always in the range of 4096*2(=8192). Why is it 8192 ? In a value that is bigger than 8192, isn't it good? Or, isn't it good in a narrower range? Isn't there what changed by the character of mtd? Please teach to me. My best regards. -- tarosa yamamoto E-Mail: tarosa.y@gmail.com