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[Duren]

Does anyone know where the dashboard is stored? The box can boot without an HD so I figured it's some internal flash memory. I searched the forums and found only one post where someone suggested it's NAND flash.

The reason I ask is because I'm wondering how big updates are and if any part is installed on the HD. I haven't connected to live to do any updates yet.

Thanks in advance.

[jameswalter]

It's located in NAND flash.  The updates (dash) are downloaded to the hard drive (or memory card) to be installed, but do flash the NAND flash chip.  No dash updates are located on the hard drive, so you can't undo dash updates.  Game updates are located on the hard drive I believe.

[Duren]

By cant undo you mean currently right? Technically it would require a re-flash?

Anyone happen to know the size of the NAND flash? I see the update is roughly 6-7MB (http://www.xbox.com/en-US/support/systemuse/xbox360/console/softwareupdates.htm).

[curranzor]

The "NAND" flash you speak of is just a flash rom but it has a NAND gate. MS probably put HEAVY security on this to prevent people from reading/writing to it. And even if someone did read from it....do you know how encrypted it would be? VERY.... Well thoes are my thoughts anyway.

[caster420]

QUOTE(curranzor @ Mar 28 2007, 01:50 PM)

The "NAND" flash you speak of is just a flash rom but it has a NAND gate. MS probably put HEAVY security on this to prevent people from reading/writing to it. And even if someone did read from it....do you know how encrypted it would be? VERY.... Well thoes are my thoughts anyway.

For one, why are you bumping threads that are three months old?  For two, you are wrong.  It has already been dumped, a long time ago, and people have been able to downgrade their kernels by corrupting the patches applied during updated (except for 4552).  

"Do you know how encrypted it would be?"  Man, do you read anything?  The entire flash it not encrypted.  Certain sectors are.  With the hypervisor exploit, encrypted sectors are able to be written to memory in unencrypted format and dumped via a serial port.  This is how they are analysing the unecrypted hypervisor code.  The NAND is also encrypted with a per box key, using fuses in the cpu.  We are very close to being able to unecrypt flashes completely using fuse values and an algorithm on a per box basis.  

Next time read a little before you post in a very old thread in which you have no idea what you are talking about.  You are leading people down a false path.

QUOTE(Duren @ Jan 10 2007, 11:54 PM)

By cant undo you mean currently right? Technically it would require a re-flash?

Anyone happen to know the size of the NAND flash? I see the update is roughly 6-7MB (http://www.xbox.com/en-US/support/systemuse/xbox360/console/softwareupdates.htm).

 

To answer this properly...

If you have not already updated to 4552, you can downgrade your kernel/dash version by corrupting the patches that are applied by that upgrade.  This requires a programmer, software, and some damn good soldering skills.  

The NAND is 16mb.

Caster.

[Pepsi_Man0077]

QUOTE(caster420 @ Mar 28 2007, 02:33 PM)

For one, why are you bumping threads that are three months old?  For two, you are wrong.  It has already been dumped, a long time ago, and people have been able to downgrade their kernels by corrupting the patches applied during updated (except for 4552).  

"Do you know how encrypted it would be?"  Man, do you read anything?  The entire flash it not encrypted.  Certain sectors are.  With the hypervisor exploit, encrypted sectors are able to be written to memory in unencrypted format and dumped via a serial port.  This is how they are analysing the unecrypted hypervisor code.  The NAND is also encrypted with a per box key, using fuses in the cpu.  We are very close to being able to unecrypt flashes completely using fuse values and an algorithm on a per box basis.  

Next time read a little before you post in a very old thread in which you have no idea what you are talking about.  You are leading people down a false path.
To answer this properly...

If you have not already updated to 4552, you can downgrade your kernel/dash version by corrupting the patches that are applied by that upgrade.  This requires a programmer, software, and some damn good soldering skills.  

The NAND is 16mb.

Caster.

You dont need to freak out if somebody is wrong about something dude