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Ecc Error Unfixed On Chunk

Did you get this with a fresh partition or only after you had loaded data? 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 Then, make sure yo select the correct options to choose whether yaffs or mtd will do the ECC. Thoughts? -- CHarles

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now i plan to mount nand flash under jffs2 > > filesystem . 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. Style DragonBox Pyra Contact Us Help Newsletter Subscribe Home Top RSS Terms and Rules Forum software by XenForo™ ©2010-2016 XenForo Ltd. If you are using mkyaffs to initialise a partition then I suggest you start off working with an empty partition.

After > > make, I got the error messages > > at the end: > > > > all of transport is passed > > > > 1. Allocator out !!!!!!!!!!!!!!!!! > > ...... > > ** > >mtd ecc error unfixed on chunk 1375:0 > > ** > >mtd ecc error unfixed on chunk 1375:1 > > ** 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.

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 For example, if you program a block, then verify it has no errors, how reliable is the data? 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. Then, make sure yo select the correct options to choose whether yaffs or mtd will do the ECC.

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. However the message text does not match the latest. 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 https://pyra-handheld.com/boards/threads/ecc-errors-in-dmesg.27776/ Fiddling with the CE might be the cause of your problems.

you might also try a format upgrade (see support section on web site), which will reset your unit to factory defaults. 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. On Saturday 29 October 2005 09:40, [email protected] wrote: > Good day dear All. > > I've installed latest yaffs and latest mtd from CVS and receive some (not > some, a 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.

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 OK the first thing is to ensure you are using the latest yaffs source. 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 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

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 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)); stragulus Still Fresh Joined: May 19, 2006 Messages: 3 Hello, I just got the gp2x and got the serial console over usb working. i have established a jffs2 > > filesystem as root filesystem in nor flash with 32M ,my sytem is ok if > > only use nor flash .

This result was derived from testing 29708 pieces of 512Mb NAND (0.16um) by writing a checkerboard pattern into blocks and storing at 125C. The ecc is capable of detecting multi-bit errors but can only correct single-bit errors. > > for a lot of chunks. Greg Garner Director of Hardware Engineering Roku Top dtaubert Topic Author Posts: 97 Joined: Wed Sep 15, 2004 3:06 pm Quote #6 Tue Oct 19, 2004 2:16 pm Thanks for Learn More.

if it is causing your unit to be unreliable, we can swap it. 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 Check out the latest downloadable searchcode server release published under fair source.

There have been some changes regarding ECC checking in mtd recently so these could be a factor.

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 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 Some NAND parts allow you to change the CE during a transaction and some others do not. nz [Download message RAW] On Friday 19 January 2007 16:03, howhowwork wrote: > Hi > Thank you for your help ! > I did the test using nandflash as root filesystem

No, create an account now. Is there any way to scrub them before they become uncorrectable double bit errors? It stills begs the question: how did I end up with so many active bad blocks? 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

In these ROM-like applications where the write/erase cycles is very low, the actual failure rate for a block is about 3 ppm after 10 years (i.e. 3 blocks out of every Can you help me understand what is the problem? 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 Yes, my password is: Forgot your password?

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 Quality Add-Ons by WMTech © 2016 WebMachine Technologies, Inc. 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 The problem is almost certainly due to a disagreement between yaffs and mtd over who is doing the ECC checking.

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 There have been some changes regarding ECC checking in mtd recently so these could be a factor. 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