IBASE IB113 - Manual (Page 59)

Copyright © 2013 IBASE Technology Inc. All Rights Reserved.
59
IBASE Technology Inc.
#echo -n "0123456789ABCDEF"|dd of=/dev/sdb bs=1024 count=1 seek=512
0+1 records in
0+1 records out
#hexdump -C /dev/sdb -s 524288 -n 16
01887800 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 |0123456789ABCDEF|
5.7. SDcard test
When booting from eMMC, SDcard is “/dev/mmcblk1” and able to see by “ls
/dev/mmcblk1*” command:
/dev/mmcblk1 /dev/mmcblk1p2 /dev/mmcblk1p4 /dev/mmcblk1p5 /dev/mmcblk1p6
When booting from SDcard, replace test pattern “/dev/mmcblk1” to “/dev/mmcblk0”
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
.
5.7.1. Erase and check
#dd if=/dev/zero of=/dev/mmcblk1 bs=1024 count=1 seek=512
1+0 records in
1+0 records out
#hexdump -C /dev/mmcblk1 -s 524288 -n 16
01887800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
5.7.2. Write and check
#echo -n "0123456789ABCDEF" | dd of=/dev/mmcblk1 bs=1024 count=1 seek=512
0+1 records in
0+1 records out
#hexdump -C /dev/mmcblk1 -s 524288 -n 16
01887800 30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46 |0123456789ABCDEF|