新找个sd卡给am335x用做启动介质，请问怎么操作？

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• HP USB Disk Storage Format Tool v2.0.6 Portable has to be used to format the SD card. This tool can be downloaded from this link.
  
• Choose a SD card and a USB based or similar SD card reader/writer. Plug it to a Windows host system.
  
• Run the HP USB Disk Storage Format Tool v2.0.6 Portable executable. The executable should automatically detect the SD card plugged via reader. Else point it to the new disk.
  
• Choose FAT32 if the SD card size is greater that 4GB. Else FAT should be good to go.
  
• Click on 'Start'.
  
• After the formatting is complete, the card is ready to be populated with the files required.
  
• The converted bootloader binary image(Bootloader binary image(boot.bin) appended with the TI Image Header) has to be renamed to "MLO" from "boot_ti.bin". The boot_ti.bin is created by building the bootloader in MMC/SD boot mode.
  
• Similarly the converted application binary image has to be renamed to "app" from "_ti.bin"
  
• Copy both the boot loader image "MLO" and the application image "app" to the SD card.
  
• Safely eject/remove the card from the host, unplug the card reader, remove the SD card. The SD card is ready for use on AM335x target.
  

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windows的分区有时也会有问题，最好是用linux的工具来做。
如果出现用windows的分区，还是起不来的时候，有个免费的工具diskgenius，可以重新分区。
                                                                         如果我的回答解决了您的问题，请确认答案，谢谢！：）

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关于这个问题，您就去baidu下DiskGenius 用这个工具删除分区，再一个fat32的分区就可以。
                                                                         如果我的回答解决了您的问题，请确认答案，谢谢！：）