75xx spiflash restore

From Technologic Systems Manuals

This needs to be done directly on the SBC. You can find the latest SPI image here. Once downloaded you can decompress the image using bzip2:

bzip2 -d 4mb-spiflash-latest.dd.bz2

Some of this series contains a 4MB SPIflash embedded on the board that can be written to by specifying lun 0, or "-l 0" which will use that chip select. The offboard flash found on various baseboards, or console boards like the TS-9448 or TS-9449 can be written to using lun 1, or "-l 1".

Backup

Backup the entire SPI flash containing the MBR, Kernel, and initrd

spiflashctl -l 1 -R 64 -z 65536 > spiflash.dd

Backup only the Kernel

spiflashctl -l 1 -R 4095 -z 512 -k part1 > /temp/zImage

Backup only the Initrd

spiflashctl -l 1 -R 32 -z 65536 -k part2 > /temp/initrd

Restore

Write the entire SPI flash containing the MBR, Kernel, and initrd

spiflashctl -l 1 -W 64 -z 65536 -i /path/to/4mb-spiflash-latest.dd

Write a new Kernel

spiflashctl -l 1 -W 4095 -z 512 -k part1 -i /temp/zImage

Write a new Initrd

spiflashctl -l 1 -W 32 -z 65536 -k part2 -i /temp/initrd