4700 SD Interface
From embeddedTS Manuals
The SD interface supports both MicroSD and MicroSDHC cards. There is a linux driver provided in the default TS-4700 kernel that allows you to access the SD card block device as /dev/mmcblk0, or /dev/mmcblk0p# for accessing a specific partition. By default the TS-4700 will use this layout:
| Device | Contents |
|---|---|
| /dev/mmcblk0p1 | Fat32 partition. |
| /dev/mmcblk0p2 | Linux kernel. |
| /dev/mmcblk0p3 | Initrd/Fastboot |
| /dev/mmcblk0p4 | Debian Filesystem |
The FAT32 partition isn't necessarily required, but unless Windows can recognize one of the partitions it will ask the user if they want to formt the disk. If you remove this partition you will need to modify the linuxrc scripts accordingly