Embest AM3517 User Manual download pdf (Page 64)

Appendix III Linux Boot Disk Format

How to create a dual-partition card for SOC8200 to boot Linux from first partition and have root

file system at second partition.

一、Introduction

This guide is meant for those looking to create a dual-partition card, booting from a FAT

partition that can be read by the OMAP3 ROM bootloader and Linux/Windows, then utilizing an

ext3 partition for the Linux root file system.

二、Details

Text marked with [] shows user input.

1、Determine which device the SD Card Reader is on your system

Plug the SD Card into the SD Card Reader and then plug the SD Card Reader into your system.

After doing that, do the following to determine which device it is on your system.

$ [dmesg | tail]

...

[ 6854.215650] sd 7:0:0:0: [sdc] Mode Sense: 0b 00 00 08

[ 6854.215653] sd 7:0:0:0: [sdc] Assuming drive cache: write through

[ 6854.215659] sdc: sdc1

[ 6854.218079] sd 7:0:0:0: [sdc] Attached SCSI removable disk

[ 6854.218135] sd 7:0:0:0: Attached scsi generic sg2 type 0

...

In this case, it shows up as /dev/sdc (note sdc inside the square brackets above).

2、Check to see if the automounter has mounted the SD Card

Note there may be more than one partition (only one shown in the example below).

$ [df -h]

Filesystem Size Used Avail Use% Mounted on

...

/dev/sdc1 400M 94M 307M 24% /media/disk

...

Note the "Mounted on" field in the above and use that name in the umount commands below.

3、If so, unmount it

$ [umount /media/disk]

4、Start fdisk

Be sure to choose the whole device (/dev/sdc), not a single partition (/dev/sdc1).

$ [sudo fdisk /dev/sdc]

5、Print the partition record

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 75 76

No comments

Embest AM3517 User Manual Page 64