I-Tech YMBAO100, Руководство пользователя

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Appendix
33
C. eMMC Test
Note: This operation may damage the data stored in eMMC flash. Before
starting the test, make sure there is no critical data in the eMMC flash
being used.
•
Read, write, and check
MOUNT_POINT_STR="/var"
#create data file
dd if=/dev/urandom of=/tmp/data1 bs=1024k count=10
#write data to emmc
dd if=/tmp/data1 of=$MOUNT_POINT_STR/data2 bs=1024k count=10
#read data2, and compare with data1
cmp $MOUNT_POINT_STR/data2 /tmp/data1
•
eMMC speed test
MOUNT_POINT_STR="/var"
#get emmc write speed"
time dd if=/dev/urandom of=$MOUNT_POINT_STR/test bs=1024k count=10
# clean caches
echo 3 > /proc/sys/vm/drop_caches
#get emmc read speed"
time dd if=$MOUNT_POINT_STR/test of=/dev/null bs=1024k count=10