On Tuesday 29 January 2008, Craig Millen wrote: > I have been experiencing a few problems when using a NAND flash for > storage in u-boot. > > When I'm reading large files (7MB) from the NAND, periodically there > will be a NAND ECC read error when using the following command: > > => nand read 400000 0 154000 > NAND read: device 0 offset 0x0, size 0x154000 1392640 bytes read: > ERROR. > > After turning on debug, the problem is occurring in the nand_read_ecc > function whereby the ecc check fails. After running it numerous times, > there seems to be no correlation between pages that fail and appears to > be completely random. > Has anyone else had these problems?
No. NAND blocks can fail and generate ECC errors. But your description doesn't really sound like this is a NAND chips related problem. Does this happen on multiple boards or just s single one? This looks more like a timing problem or something like this to me. IIRC, then you had to change the 4xx NDFC driver to access the NAND via 8bit access, correct? I have used this driver on multiple 4xx boards and on all boards this driver can be used as is, meaning with 32bit access enabled. Perhaps you still have a problem with the interface to the NAND chips. > Furthermore, the "nand write" command doesn't skip bad blocks. Are you > supposed to use a different command to write files to the NAND that > skips the bad blocks? As already mentioned the .jffs2" extension is what you want. ".i" for "image" should do too. Best regards, Stefan ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [EMAIL PROTECTED] ===================================================================== ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
