Am 16.02.2017 um 09:57 schrieb Vesta:

BusyBox v1.4.2 on an embedded device running Linux v2.6.18.

I tried to download mtdblock6 "RootFileSystem" MTD partition via tftp, but at 
the very end, transfer every time ended with error tftp: read error: Input/output error.

This way you just download the device file, not the block device represented by the device file. Use netcat/nc or a SSH tunnel in combination with dd to create an image of the block device on the fly. Imaging with dd also works whan mounted, but might result in corruption of the image (usually no bad corruption since most devices with simple flash keep writes low) when mounted read-write.


dev:    size   erasesize  name
mtd6: 00416800 00010000 "RootFileSystem"

brw-rw----    1 0        0         31,   6 mtdblock6

Is there way to solve this issue? Does it possible unmount RootFileSystem MTD 
partition without rebooting and dropping network connection? Busybox commands 
is limited by defined functions only.
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