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RP-103-SMC User Manual
5.
SD Card Test
When SMARC is booted from eMMC, SD card is “/dev/mmcblk1” and able to see by
“ls /dev/mmcblk1*” command:
/dev/mmcblk1 /dev/mmcblk1p2 /dev/mmcblk1p4
/dev/mmcblk1p5 /dev/mmcblk1p6
When SMARC is booted from SD card, replace test pattern “/dev/mmcblk1” to
“/dev/mmcblk0”.
Note:
This operation may damage the data stored the SD card. Before starting the
test, make sure there is no critical data in the eMMC flash being used.
•
Read, write, and check
SD_DIR="/run/media/mmcblk1"
#create data file
dd if=/dev/urandom of=/var/data1 bs=1024k count=100
#write data to SD card
dd if=/var/data1 of=$ SD_DIR/data2 bs=1024k count=100
#read data2, and compare with data1
cmp $SD_DIR/data2 /var/data1
•
SD card speed test
SD_DIR="/run/media/mmcblk1"
# SD write speed
dd if=/dev/zero of=$SD_DIR/test bs=1M count=1000
oflag=nocache
# SD read speed
dd if=$SD_DIR/test of=/dev/null bs=1M oflag=nocache
Содержание RP-103-SMC
Страница 15: ...Introduction RP 103 SMC User Manual 7 1 ...
Страница 17: ...Introduction RP 103 SMC User Manual 9 1 RP 103 SMC Dimensions ...
Страница 18: ...10 RP 103 SMC User Manual 1 4 I O View ...
Страница 20: ...12 Chapter 2 Jumpers and Connectors on the Carrier Board ...
Страница 48: ...40 RP 103 SMC User Manual CN24 SATA power RM N8QM only Pin Signal Name 1 5V 2 GND 3 GND 4 12V ...
Страница 50: ...42 RP 103 SMC User Manual CN26 SATA power Pin Signal Name 1 5V 2 GND 3 GND 4 12V ...
Страница 52: ...44 RP 103 SMC User Manual CN28 CAN2 3 Pin Signal Name 1 CAN2_H 2 CAN2_L 3 GND 4 CAN3_H 5 CAN3_L 6 GND ...
Страница 56: ...48 RP 103 SMC User Manual CN32 FAN Pin Signal Name 1 GND 2 12V 3 N C 4 N C ...
Страница 60: ...52 RP 103 SMC User Manual CN35 RTC BAT Pin Signal Name 1 LI_CELL 2 GND ...
Страница 76: ...68 RP 103 SMC User Manual This page is intentionally left blank ...