Backup / Restore ECU firmware

[wai]

G'day,

Is it possible to backup and restore the ECU firmware?

I take it that it should be possible given that the ECU can be upgraded.

[h100vw]

What ecu type?

[wai]

What ecu type?

Basically any one that can be updated?

[h100vw]

Where are the questions leading? I can flash std files back into all ECUs types that I can read.