Question QFIL/EDL Error: Unknown chunk type cac2

[Artemis09]

Tried flashing in EDL mode with QFIL but failed with error Unknown chunk type cac2
Looking for a solution to help out. Logs attached for more info
Thanks

 

[Renate]

Unknown chunk type cac2

Ha, ha, I know this one.
Some implementations of sparse file handling don't know about 0xcac2 (fill operation).

You can get an updated utility or simply un-sparsify on your desktop.
Then you can flash a non-sparse file.
Look for a utility called "simg2img".
I've got my own Windows version in my sig.

 

[Artemis09]

Getting this error now only nop and sig tag can be received before authenticaation

 

[Renate]

I'd respond if I knew what you were talking about or what particular point of my post you were addressing.

 

[Artemis09]

I'd respond if I knew what you were talking about or what particular point of my post you were addressing.

un-sparsified userdata.img
changed sparse=false in rawprogram.xml
then flashed with QFIL

Got new error -> nop and sig tag can be received before authenticaation

 

[Renate]

Post a link to (just) userdata.img, please.

 

[Artemis09]

Post a link to (just) userdata.img, please.

 

[Renate]

Well, that looks fine.
Apparently your antiquated tools don't understand 0xcac2 chunks and they don't like 4 GB image files.
sizeof(4GB file)==0 using (32 bit math)

Since they've got 3.9 GB of don't care at the end we can chop that off.

C:\>copy userdata.img userdatamod.img
C:\>modfile userdatamod.img /l 14 1b
[00000014] 0000001c => 0000001b
C:\>simg2img userdatamod.img raw.img

Yeah, yeah, you probably don't have modfile. Just use any hex editor.
The result of unsparsifying should be 175,357,952

Or find an updated utility.