AM5728: eMMC is not cloned completely

vijay Patil

Intellectual 810 points

Part Number: AM5728

Hii

My custom board Emmc flash size is more than 4GB.

I am trying to clone the Emmc flash of AM5728 custom board but error is coming:

root@am5728-evm# mount /dev/mmcblk1p1 pd/

root@am5728-evm# dd if=/dev/mmcblk0 of=pd/backup.img

dd: writing 'pd/backup.img': File too large

8388609+0 records in

8388607+1 records out

root@am5728-evm#

This is happening because sd card is of FAT file system and it will copy upto ~4Gb.

Then is there any alternative to clone whole EMMC content, without missing any file.

Thanks & Regards

Vijay Patil

over 7 years ago

0 Dwarakesh Radhakrishnan over 7 years ago

Guru 13660 points

Hi Vijay,

If you can format SDCard to FAt32 filesystems, you can get more size, I think it is FAT16. Another option would be that entire eMMC may not be used. You can check your file systems size and copy a smaller size, like 2GB.

0 vijay Patil over 7 years ago in reply to Dwarakesh Radhakrishnan

Intellectual 810 points

Thank you for reply

The sd Card is FAT32 Formatted still it giving error.
i want to clone my entire Emmc flash, if any other option please suggest.

Thanks
Vijay Patil

0 Dwarakesh Radhakrishnan over 7 years ago in reply to vijay Patil

Guru 13660 points

Just to confirm, have you made sure of=pd/backup.img, pd is part of SDCard and not eMMC. What is the formatted size of SDCard, when you connect to PC ?

0 vijay Patil over 7 years ago in reply to Dwarakesh Radhakrishnan

Intellectual 810 points

Yes I confirmed the pd/backup.img is part of SD Card,
The card is showing FAT32 formatted in linux.

0 Dwarakesh Radhakrishnan over 7 years ago in reply to vijay Patil

Guru 13660 points

What is its size ? Can you change the format ? If so can you try ext4 format.

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AM5728: eMMC is not cloned completely