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Ecc Error Unfixed On Chunk

There have been some changes regarding ECC checking in mtd recently so these could be a factor. Anyclues what > > could be wrong .. > > Any help will be highly appreciated. > > > > > > regards > > > > please help me out Don't worry about it unless the device starts becoming unstable. Derek Top Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending Post Reply Who is online Users browsing this forum: No registered http://csimonitoring.com/ecc-error/ecc-error-fixed-on-chunk.php

ie something along the lines of: sniff mtd if mtd page size == 512 then yaffs1 handling else yaffs2 handling That should be pretty straight forward to do and would save Re: [Yaffs] ecc error unfixed on chunkCatalàDanskDeutschΕλληνικάEnglishEspañolsuomiFrançaisGalegomagyarItaliano日本語NederlandsPolskiPortuguêsPortuguês BrasileiroThis message is part of the following thread:the complete thread tree sorted by [email protected] at 2005-10-28 20:40 Attachments:Message as email (text/plain)Author: Charles ManningDate: 2005-11-01 20:43 UTCTo: yaffsCC: yuri.golovachSubject: Re: [Yaffs] ecc error In addition, due to the number of > overhead blocks, our first small boot partition is dynamically sized to > make sure there is enough free space for a kernel. > Some NAND parts allow you to change the CE during a transaction and some others do not. http://www.aleph1.co.uk/lurker/message/20051101.204311.1fe7641a.en.html

XenForo Add-ons by Brivium ™ © 2012-2016 Brivium LLC. GBiz is too! Latest News Stories: Docker 1.0Heartbleed Redux: Another Gaping Wound in Web Encryption UncoveredThe Next Circle of Hell: Unpatchable SystemsGit 2.0.0 ReleasedThe Linux Foundation Announces Core Infrastructure I've installed latest yaffs and latest mtd from CVS and receive some (not some, a lot of) next error messages: **>>ecc error unfixed on chunk 32:0 **>>ecc error unfixed on chunk1 It does not look like you are.

OK the first thing is to ensure you are using the latest yaffs source. The ecc is capable of detecting multi-bit errors but can only correct single-bit errors. > > for a lot of chunks. 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 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 are using mkyaffs to initialise a partition then I suggest you start off working with an empty partition. Retire? */ unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; ecc--; b[ecc / 8] ^= (1 << (ecc & 7)); /* Now recvalc the ecc */ yaffs_calc_tags_ecc(tags); return 1; /* recovered error 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: https://pyra-handheld.com/boards/threads/ecc-errors-in-dmesg.27776/ n_bytes_msb) << 10); ext_tags->serial_number = tags.serial_number; } } return YAFFS_OK; } else { return YAFFS_FAIL; } } int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) { struct yaffs_spare spare; memset(&spare, 0xff, sizeof(struct yaffs_spare));

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 Also I have a short look on sources, and this error messages comes from yaffs_ReadChunkFromNAND function (yaffs_tagscompat.c) else if(nspare.eccres2<0) { T(YAFFS_TRACE_ERROR,(TSTR("**>>ecc error unfixed on chunk1 %d:1\n"),chunkInNAND)); } at error case both I have no such problems with previous yaffs and mtd versions. Yes, my password is: Forgot your password?

i have established a jffs2 > > filesystem as root filesystem in nor flash with 32M ,my sytem is ok if > > only use nor flash . http://forums.roku.com/viewtopic.php?t=320 ie something along the lines of: sniff mtd if mtd page size == 512 then yaffs1 handling else yaffs2 handling That should be pretty straight forward to do and would save Ok, thanks for your reply. Newer Than: Search this thread only Search this forum only Display results as threads Useful Searches Recent Posts More...

However the message text does not match the latest. Thoughts? -- CHarles Next Message by Thread: yaffs1/2 autodetect idea On Friday 28 October 2005 21:31, Nick Bane wrote: > Supplementally: > One can specify rootfs in the kernel build as The messages are saying that a chunk was read, and ecc errors were found. 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.

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 However the message text does not match the latest. gen ! 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.

Did you get this with a fresh partition or only after you had loaded data? Would it help to modify yaffs2 to automatically handle the yaffs1 case? If I configure YAFFS to use its own ECC calculations it seems to work fine, but if I try to use MTD ECC calculations ( #undef CONFIG_YAFFS_DOES_ECC ) a lot of

It hasn't shown any sign of being unstable yet, luckily B) Last edited by a moderator: Dec 17, 2015 stragulus, Jun 14, 2006 #3 (You must log in or sign

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 The ecc is capable of detecting multi-bit errors but can only correct single-bit errors. > > for a lot of chunks. 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 * i boot my board using jffs2 filesystem as root filesystem > > # cat /proc/mtd > > dev: size erasesize name > > mtd0: 03c00000 00020000 "User11 FS" > > mtd1:

Since there will be a non-zero data retention failure rate, you should limit the amount of code to 1 block to achieve a low ppm probability of failure." Based on this There have been some changes regarding ECC checking in mtd recently so these could be a factor. Nick There are probably quite a few people with the requirement of one firmware supporting both 512 and 2k NAND board variants. Did you get this with a fresh partition or only after you had loaded data?

Keeping -CE > asserted during the whole sector reads interferes with the NOR flash > drivers > so it causes contention on the static bus. > Can you give me any I try to compared with previous versions, and nspare.eccres2==nspare.eccres1==0 for chunk 32. 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 Then, make sure yo select the correct options to choose whether yaffs or mtd will do the ECC.

Stay logged in Official Pyra and Pandora Site Home Forums > Other Consoles > GPH Consoles > GP2X > I need help > Home The Pyra The Pyra Quick Links Press In addition, due to the number of > overhead blocks, our first small boot partition is dynamically sized to > make sure there is enough free space for a kernel. > Learn More. Only one of them should do the checking.

NAND flash is quite lossy by nature, so blocks need to be remapped on an ongoing basis either by the driver or by the filesystem. Quality Add-Ons by WMTech © 2016 WebMachine Technologies, Inc. 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. Can you help me understand what is the problem?

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. 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. Retire? */97                unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes;9899                ecc--;100101                b[ecc / 8] ^= (1 << (ecc & 7));102103    Please, can you help and explain me, where is this problem could be?

if it is causing your unit to be unreliable, we can swap it. 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 By continuing to use this site, you are agreeing to our use of cookies. 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

uide_e.pdf "There is one question that often comes up “Is ECC really necessary?” After all, the likeliest cause of a bit error is during the programming process.