nandwrite or flashcp to write raw image to mtd device

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I want to write an image to a mtd device. Here is the /proc/mtd entry for the mtd device.

/ # cat /proc/mtd dev: size erasesize name ... mtd10: 007c0000 00040000 "recovery" ...

First I performed a flash_eraseall on /dev/mtd10 which was successful. Then, I tried flashcp:

flashcp /path/to/image /dev/mtd10

This command fails with the error:

While erasing blocks from 0x00000000-0x00680000 on /dev/mtd10: Invalid argument dmesg has the following error:

msm_nand_erase: unsupported erase len, 6815744

But if I use nandwrite to write the image, the write works fine:

/ # nandwrite -p /dev/mtd10 /path/to/image Writing data to block 0 at offset 0x0 Writing data to block 1 at offset 0x40000 ... Writing data to block 5 at offset 0x140000 ... Writing data to block 17 at offset 0x440000 Writing data to block 18 at offset 0x480000 Writing data to block 19 at offset 0x4c0000 ... Writing data to block 24 at offset 0x600000 Writing data to block 25 at offset 0x640000

So is nandwrite the recommended way to write a raw image to a mtd device?

flash-memory
asked on Stack Overflow Mar 19, 2019 by sg1993 • edited Mar 19, 2019 by sg1993

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