i.MX Processorsのトピックecc problem on imx28 https://community.nxp.com/t5/i-MX-Processors/ecc-problem-on-imx28/m-p/389396#M56607 <HTML><HEAD></HEAD><BODY><P>Hello all,</P><P>We are using imx28 for a project. We have 4GB MLC NAND and we use UBI fs. We created 6 mtd partitions.</P><P>20&nbsp;&nbsp; MB for linux</P><P>256 MB for rootfs</P><P>256 MB for backup of rootfs</P><P>others are not important</P><P></P><P>We have encountered ecc problem. Sometimes rootfs becomes readonly, sometimes it couldn't be mounted. We are using Samsung K9LBG08U0D, it has (4K + 218)B blocks and supports 8 bit failure for ecc. But in gpmi_nfc_set_geometry() function (in gpmi-nfc-hal-common.c file), ecc_strength is set to 16 for 218 bytes oob. Is this difference important? Should I set ecc_strength to 8?</P><P></P><P>Thanks</P><P>Mehmet</P></BODY></HTML> Tue, 14 Oct 2014 07:26:41 GMT mehmet 2014-10-14T07:26:41Z ecc problem on imx28 https://community.nxp.com/t5/i-MX-Processors/ecc-problem-on-imx28/m-p/389396#M56607 <HTML><HEAD></HEAD><BODY><P>Hello all,</P><P>We are using imx28 for a project. We have 4GB MLC NAND and we use UBI fs. We created 6 mtd partitions.</P><P>20&nbsp;&nbsp; MB for linux</P><P>256 MB for rootfs</P><P>256 MB for backup of rootfs</P><P>others are not important</P><P></P><P>We have encountered ecc problem. Sometimes rootfs becomes readonly, sometimes it couldn't be mounted. We are using Samsung K9LBG08U0D, it has (4K + 218)B blocks and supports 8 bit failure for ecc. But in gpmi_nfc_set_geometry() function (in gpmi-nfc-hal-common.c file), ecc_strength is set to 16 for 218 bytes oob. Is this difference important? Should I set ecc_strength to 8?</P><P></P><P>Thanks</P><P>Mehmet</P></BODY></HTML> Tue, 14 Oct 2014 07:26:41 GMT https://community.nxp.com/t5/i-MX-Processors/ecc-problem-on-imx28/m-p/389396#M56607 mehmet 2014-10-14T07:26:41Z Re: ecc problem on imx28 https://community.nxp.com/t5/i-MX-Processors/ecc-problem-on-imx28/m-p/389397#M56608 <HTML><HEAD></HEAD><BODY><P>Hi Mehmet</P><P></P><P>ecc settings are not important in your case, just for testing</P><P>you can replace NAND, may be it is just damaged.</P><P></P><P>Best regards</P><P>igor</P></BODY></HTML> Tue, 14 Oct 2014 10:09:45 GMT https://community.nxp.com/t5/i-MX-Processors/ecc-problem-on-imx28/m-p/389397#M56608 igorpadykov 2014-10-14T10:09:45Z