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A problem about write external memory

Question asked by zhangzhiyong on Jul 1, 2017
Latest reply on Jul 2, 2017 by igorpadykov

Hello ,I used IMX6Q in my design,There is a problem with me ,my design have a eMMC(8G Micron) and a uSSD(64G),I want test the memory.

step1  I use"dd if=/dev/zero of=/big_file bs=50M count=10",then It says"524288000 bytes (500.0MB) copied, 65.870651 seconds, 7.6MB/s",

step2 used"dd if=/dev/zero of=/big_file bs=50M count=10",then It says"524288000 bytes (500.0MB) copied, 98.181022 seconds, 5.1MB/s".

step3 hen I use "dd if=/dev/zero of=/big_file1 bs=50M count=10" then It says"

EXT3-fs error (device mmcblk0p1): ext3_free_blocks_sb: bit already cleared for block 6144
EXT3-fs error (device mmcblk0p1): ext3_free_blocks_sb: bit already cleared for block 6145
EXT3-fs error (device mmcblk0p1): ext3_free_blocks_sb: bit already cleared for block 6146
EXT3-fs error (device mmcblk0p1): ext3_free_blocks_sb: bit already cleared for block 6147

.......

"

and I can`t write  memory more than 600M.If I write more than 600M,the system breakdown。

what`s wrong ? what can I do ?

 

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