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Ecc Error Unfixed On Chunk

NAND has errors when bought new from the factory, you just don't know where there are until you try and write to them, and others appear over time. Did you get this with a fresh partition or only after you had loaded data? The problem is almost certainly due to a disagreement between yaffs and mtd over who is doing the ECC checking. Derek Top RokuGreg Roku Engineering Posts: 110 Joined: Wed Sep 01, 2004 8:22 am Location: Arkansas Contact: Contact RokuGreg Website Re: bad blocks Quote #5 Tue Oct 19, 2004 1:44 have a peek here

However the message text does not match the latest. now i plan to mount nand flash under jffs2 > > filesystem . XenForo Add-ons by Brivium ™ © 2012-2016 Brivium LLC. This appears to still be in place in the latest release... http://www.aleph1.co.uk/lurker/message/20051101.204311.1fe7641a.en.html

A NAND-flash specific file system. * * Copyright (C) 2002-2010 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning * * This OSDir.com linux.file-systems.yaffs Subject: Re: ecc error unfixed on chunk Date Index Thread: Next Thread Index Hi Yuri You don't give much detail to work with, but I'll try. Please, can you help and explain me, where is this problem could be? The problem is almost certainly due to a disagreement between yaffs and mtd over who is doing the ECC checking.

Ok, thanks for your reply. For example, if you program a block, then verify it has no errors, how reliable is the data? Dismiss Notice Cookies Pyra Preorder Ecc Errors In Dmesg Discussion in 'I need help' started by stragulus, Jun 13, 2006. For systems > with mixed nand builds (we have 32MB boards using 512b to 384MB using 3 > 1GBit 2k) a single kernel is often desireable for production.

Squidge, Jun 13, 2006 #2 stragulus Still Fresh Joined: May 19, 2006 Messages: 3 Squidge posted on Jun 13 2006 said: ↑ Yes, that's normal. I need to use MTD ECC since I'll want to use Hardware ECC to speed up read/write operations (this test use MTD Software ECC routines) Regards, Claudio Lanconelli # cat /proc/mtd For systems > with mixed nand builds (we have 32MB boards using 512b to 384MB using 3 > 1GBit 2k) a single kernel is often desireable for production. https://pyra-handheld.com/boards/threads/ecc-errors-in-dmesg.27776/ If you can, then diff the old and new mtd to check what changes might be impacting on the problem. -- Charles This message was posted to the following mailing lists:YAFFSMailing

PATCH!!! (Was Sorry state of YAFFS2)Stoneboat Mailing List Archive adminisztrátora: JennyLurker (verzió: 2.3) Log in or Sign up Official Pyra and Pandora Site Home Forums > Other Consoles > GPH Consoles There have been some changes regarding ECC checking in mtd recently so these could be a factor. This result was derived from testing 29708 pieces of 512Mb NAND (0.16um) by writing a checkerboard pattern into blocks and storing at 125C. Only one of them should do the checking.

Would it help to modify yaffs2 to automatically handle the yaffs1 case? Now I switched to latest CVS yaffs2 (in yaffs1 mode) + latest CVS MTD patched for uClinux 2.4.31. I siuggest you refer to your datasheets and check the timing etc. > > > > > > > howhowwork > 2007-01-19 > > > > 发件人: Charles Manning > 发送时间: In our > version of bootldr (see > http://husaberg.toby-churchill.com/balloon/releases/development/bootldr/boo >tldr36) 2k/512 byte pages size for the root mtd device is detected and > rootfs=yaffs/yaffs2 is selected.

nz> Date: 2007-01-19 4:05:29 Message-ID: 200701191705.29309.manningc2 () actrix ! The ecc is capable of detecting multi-bit errors but can only correct single-bit errors. > > for a lot of chunks. Derek Top dtaubert Topic Author Posts: 97 Joined: Wed Sep 15, 2004 3:06 pm Quote #4 Tue Oct 19, 2004 12:56 pm These errors are coming from YAFFS (output below Did you use mkyaffs to load an image or just start with an empty partition? > > I have no such problems with previous yaffs and mtd versions. > > Also

Download Now android_kernel_asus_tf300t /fs/yaffs2/yaffs_tagscompat.c Language C Lines 423 MD5 Hash 79df4156c522bdafba6e92f236adbe04 Estimated Cost $7,632 (why?) Repository https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t.git View Raw File Find Similar Files View File Tree 1 2 3 4 5 PATCH!!! (Was Sorry state of YAFFS2)[Yaffs] yaffs1/2 autodetect ideaStoneboat Mailing List Archive administrated by JennyLurker (version 2.3) [Yaffs] ecc error unfixed on chunkCatalàDanskDeutschΕλληνικάEnglishEspañolsuomiFrançaisGalegomagyarItaliano日本語NederlandsPolskiPortuguêsPortuguês BrasileiroEz az üzenet a következő szál része:a teljes A NAND-flash specific file system.3 *4 * Copyright (C) 2002-2007 Aleph One Ltd.5 *   for Toby Churchill Ltd and Brightstar Engineering6 *7 * Created by Charles Manning 8 *9 * This program is free software; you can redistribute Yes, my password is: Forgot your password?

These errors I've received just at the mount procedure, or when I'm trying to do, for example, ls. A NAND-flash specific file system. * yaffs_tagscompat.h: Tags compatability layer to use YAFFS1 formatted NAND. * * Copyright (C) 2002 Aleph One Ltd. * * Created by Charles Manning * Did you use mkyaffs to load an image or just start with an empty partition? > > I have no such problems with previous yaffs and mtd versions. > > Also

The messages are saying that a chunk was read, and ecc errors were found.

After > > make, I got the error messages > > at the end: > > > > all of transport is passed > > > > 1. The ecc is capable of detecting multi-bit errors but can only correct single-bit errors. > > for a lot of chunks. Nick There are probably quite a few people with the requirement of one firmware supporting both 512 and 2k NAND board variants. Derek Top RokuAnthony El Jefe Posts: 703 Joined: Fri Aug 20, 2004 12:44 pm Location: Palo Alto, CA USA Contact: Contact RokuAnthony Website Quote #2 Tue Oct 19, 2004 11:55

NAND has errors when bought new from the factory, you just don't know where there are until you try and write to them, and others appear over time.Click to expand... using the tools "flash_eraseall /dev/mtd6 ",passed > > > > 3. # mount -tyaffs /dev/mtdblock4 /mnt/ > > yaffs: dev is 32505860 name is "mtdblock4" > > yaffs: Attempting MTD mount Pyra Wiki The Pandora The Pandora Quick Links Firmware Images GIT Repository App Repository PandoraWiki Forums Forums Quick Links Search Forums Recent Posts Contact Us / Support Contact Us / Support Would it help to modify yaffs2 to automatically handle the yaffs1 case?

These errors I've received just at the mount > procedure, or when I'm trying to do, for example, ls. Top dtaubert Topic Author Posts: 97 Joined: Wed Sep 15, 2004 3:06 pm Quote #3 Tue Oct 19, 2004 12:30 pm Is the onboard flash NAND or NOR based? if it is causing your unit to be unreliable, we can swap it. Then, make sure yo select the correct options to choose whether yaffs or mtd will do the ECC.

Quality Add-Ons by WMTech © 2016 WebMachine Technologies, Inc. Retire? */97                unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;9899                ecc--;100101                b[ecc / 8] ^= (1 << (ecc & 7));102103    I can infer from what you write below that you are using YAFFS2 code with backward compatability to yaffs1. Can you help me understand what is the problem?

It's not a problem for me at the moment, but I suspect it will be in the near future. Retire? */ unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; ecc--; b[ecc / 8] ^= (1 << (ecc & 7)); /* Now recvalc the ecc */ yaffs_CalcTagsECC(tags); return 1; /* recovered error Also, the file system gph use in 2.0 is particularly noisy about such "errors". In our > version of bootldr (see > http://husaberg.toby-churchill.com/balloon/releases/development/bootldr/boo >tldr36) 2k/512 byte pages size for the root mtd device is detected and > rootfs=yaffs/yaffs2 is selected.

If you are using mkyaffs to initialise a partition then I suggest you start off working with an empty partition. Nick There are probably quite a few people with the requirement of one firmware supporting both 512 and 2k NAND board variants. Given that /dev/mtdblock/2 is in active use by the system, what's the expected MTTF for the onboard flash? I downloaded the newest yaffs2 code from > > "http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs" and place it to linux > > kernel 2.6.11.

If you can, then diff the old and new mtd to check what changes might be impacting on the problem. -- Charles Thread at a glance: Next Message by Date: yaffs1/2 I have no such problems with previous yaffs and mtd versions.