From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fep19.mx.upcmail.net ([62.179.121.39]) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1RFnFo-0000Vj-6L for linux-mtd@lists.infradead.org; Mon, 17 Oct 2011 13:29:21 +0000 Received: from edge01.upcmail.net ([192.168.13.236]) by viefep19-int.chello.at (InterMail vM.8.01.02.02 201-2260-120-106-20100312) with ESMTP id <20111017132918.ZKEH2111.viefep19-int.chello.at@edge01.upcmail.net> for ; Mon, 17 Oct 2011 15:29:18 +0200 Message-ID: <4E9C2DAC.7090109@swissonline.ch> Date: Mon, 17 Oct 2011 15:29:16 +0200 From: Daniel Kuhn MIME-Version: 1.0 To: linux-mtd@lists.infradead.org Subject: UBIFS recovery fails Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, I have a problem with a device which uses UBI + UBIFS on a 32GB NAND Flash (16*2GB). The filesystem worked without problems for a couple of months but now I get an error if I try to mount the volume. Attaching the UBI-Device works fine as you can see in the following messages: =============== UBI: max. sequence number: 18803 UBI: attached mtd3 to ubi2 UBI: MTD device name: "LogData" UBI: MTD device size: 32544 MiB UBI: number of good PEBs: 130119 UBI: number of bad PEBs: 57 UBI: number of corrupted PEBs: 0 UBI: max. allowed volumes: 128 UBI: wear-leveling threshold: 4096 UBI: number of internal volumes: 1 UBI: number of user volumes: 1 UBI: available PEBs: 0 UBI: total number of reserved PEBs: 130119 UBI: number of PEBs reserved for bad PEB handling: 1301 UBI: max/mean erase counter: 30/0 UBI: image sequence number: 1813038814 UBI: background thread "ubi_bgt2d" started, PID 1376 =============== UBIFS prints the following error messages during mount (with dmesg -n8, UBIFS debugging enabled): =============== UBIFS: recovery needed UBIFS error (pid 611): ubifs_recover_leb: corrupt empty space LEB 3550:188416, c orruption starts at 64362 UBIFS error (pid 611): ubifs_scanned_corruption: corruption at LEB 3550:252778 UBIFS error (pid 611): ubifs_scanned_corruption: first 1174 bytes from LEB 3550: 252778 00000000: ffffffbf ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000040: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000060: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000080: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000000a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000000c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000000e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000100: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000120: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000140: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000160: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000180: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000001a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000001c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000001e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000200: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000220: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000240: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000260: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000280: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000002a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000002c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000002e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000300: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000320: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000340: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000360: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000380: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000003a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000003c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 000003e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000400: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000420: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000440: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000460: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffff f ................................ 00000480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ...................... UBIFS error (pid 611): ubifs_recover_leb: LEB 3550 scanning failed =============== The Kernel (2.6.38-rc8) runs on an ARM926 CPU (OMAPL138 from TI). I've taken the latest UBI + UBIFS sources from the GIT-Repository "|git://git.infradead.org/~dedekind/ubifs-v2.6.38.git|" which eliminated a segmentation fault I had before updating. "mtdinfo -a" prints the following information for the broken device mtd3: =============== mtd3 Name: LogData Type: nand Eraseblock size: 262144 bytes, 256.0 KiB Amount of eraseblocks: 130176 (34124857344 bytes, 31.8 GiB) Minimum input/output unit size: 4096 bytes Sub-page size: 1024 bytes OOB size: 128 bytes Character device major/minor: 90:6 Bad blocks are allowed: true Device is writable: true =============== Is there a way to recover the data on the device? Thanks in advance, Daniel Kuhn