Is SD Backup a full backup of the ROM?

[Cyberdyne]

Hello!

I read this posting:
http://forum.xda-developers.com/showpost.php?p=1014335&postcount=1

I wonder if this is a good way to make an upgrade safe. Does it realy backup everything?
I should buy me a small miniSD-card, make a backup first and put this miniSD-card somewhere save. If I flash a new ROM and run into troubles some day, I could just take the sd-card and get back to the current state. Is that right? Does this backup includes ROM, ExROM, IPL/SPL, splashscreens and everything? Will it be CID locked again?
If this is true, this information should be added to all flashing tutorials.

Yes, I tried to get this information by seaching. Maybe I am just to stupid?!

Thank you very much!
Cyberdyne

[Cyberdyne]

Does realy noone knows what the SD backup realy does?

I saw the hint that people should get an SD backup from someone if the bricked their telephone. If it does not restore the whole thing you would get a mixture of your old ROM and the one from your friend. OK, it is better than a bricked one and you can flash now (hopefully).

Any information would be great. I would spend the money for an extra miniSD card if it would get me on the safe side.

Cyberdyne

[H9S9]

As my personal exp.

The answer is No,

The stroyline is like this,

I got mess up with my sound driver, so i do hard reset and before that i backup everything.

After i restore i get back my sound driver and all my S/W, all cracked, so i think personally it DIND'T backup the ROM(my case my bad ROM)