我的开发板是i.mx6DL SabreSD. 在板子刚下来时，做了400M DDR压力测试，正常通过，使用Mfgtools-Rel-4.1.0_130816_MX6DL_UPDATER 下载程序到emmc中，发现到"access boot partition 1"时出错，在串口中查看发现报如下错误：
UTP: received command '$ dd if=/dev/zero of=/dev/mmcblk0 bs=512 seek=1536 count=16'
UTP: executing "dd if=/dev/zero of=/dev/mmcblk0 bs=512 seek=1536 count=16"
16+0 records in
16+0 records out
8192 bytes (8.0KB) copied, 0.000264 seconds, 29.6MB/s
UTP: sending Success to kernel for command $ dd if=/dev/zero of=/dev/mmcblk0 bs=512 seek=1536 count=16.
utp_poll: pass returned.
UTP: received command '$ echo 0 > /sys/block/mmcblk0boot0/force_ro'
UTP: executing "echo 0 > /sys/block/mmcblk0boot0/force_ro"
sh: can't create /sys/block/mmcblk0boot0/force_ro: nonexistent directory
UTP: sending Non-success to kernel for command $ echo 0 > /sys/block/mmcblk0boot0/force_ro.
utp_poll: exit with status 256
我在ucl2.xml中Android-SabreSD-eMMC下注释掉
<CMD state="Updater" type="push" body="$ echo 0 > /sys/block/mmcblk0boot0/force_ro">access boot partition 1</CMD>
<CMD state="Updater" type="push" body="$ echo 1 > /sys/block/mmcblk0boot0/force_ro"> re-enable read-only access</CMD>后，
报这个错can't create /sys/devices/platform/sdhci-esdhc-imx.3/mmc_host/mmc0/mmc0:0001/boot_config: nonexistent directory
一起注释掉<CMD state="Updater" type="push" body="$ echo 8 > /sys/devices/platform/sdhci-esdhc-imx.3/mmc_host/mmc0/mmc0:0001/boot_config">enable boot partion 1 to boot</CMD>后
跑到 “Partitioning...”出错，错误信息如下：
Warning: /dev/mmcblk0 is not a block device
Disk /dev/mmcblk0: cannot get geometry
Disk /dev/mmcblk0: 0 cylinders, 255 heads, 63 sectors/track
sfdisk: ERROR: sector 0 does not have an msdos signature
/dev/mmcblk0: unrecognized partition table type
Old situation:
No partitions found
sfdisk: Partition 1 does not exist, cannot change it
PS：我新板子emmc是使用的SD4_DATA0到SD4_DATA7,SD4_CMD,SD4_CLK，是不是需要在mfg工具中修改u-boot-mx6dl-sabresd.bin和uImage？
PS：几块板子都出现这样的问题，应该不是硬件问题吧！
不知道我描述的是否清楚，如有不正确，请批评指正，谢谢！
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