Advantech SG-1103 Bedienungsanleitung PDF herunterladen (Seite 19)

11 ROM-5420 User Manual

Chapter 3 Software Functionality

Step 3: Write and check

#echo -n "0123456789ABCDEF" | dd of=/dev/sdb bs=1024 count=1

seek=25118

0+1 records in

0+1 records out

#hexdump -C /dev/sdb -s 25720832 -n 16

01887800 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 |0123456789ABCDEF|

3.1.4 SD Test

Step 1: When booting from eMMC, you would see only below directories:

#ls /dev/mmcblk*

/dev/mmcblk0 /dev/mmcblk0boot0 /dev/mmcblk0boot1 /dev/mmcblk0p1

Step 2: Insert SD card to SD card slot and check your device again. You should be

able to see more directories. /dev/mmcblk1 is the SD card storage.

#ls /dev/mmcblk*

/dev/mmcblk0 /dev/mmcblk0boot1 /dev/mmcblk1 /dev/mmcblk1p2

/dev/mmcblk0boot0 /dev/mmcblk0p1 /dev/mmcblk1p1

Step 3: Erase and check

#dd if=/dev/zero of=/dev/mmcblk1 bs=1024 count=1 seek=25118

1+0 records in

1+0 records out

#hexdump -C /dev/mmcblk0 -s 25720832 -n 16

01887800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

Step 4: Write and check

#echo -n "0123456789ABCDEF" | dd of=/dev/mmcblk1 bs=1024 count=1

seek=25118

0+1 records in

0+1 records out

#hexdump -C /dev/mmcblk0 -s 25720832 -n 16

01887800 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 |0123456789ABCDEF|

Note! This operation may damage the data stored in USB flash disk. Please

make sure there is no critical data in the USB flash disk being used for

this test.

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Advantech SG-1103 Bedienungsanleitung Seite 19