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Soldering more memory chips to RevoDrive

post #1 of 11
Thread Starter 
First time poster long time reader. I searched google and the forums for this but could not find anything.

I was wondering if it was possible to manually solder on nand chips(I think they are nand flash chips) to the PCB of a 110Gb Revodrive. It looks tempting to try and see if it is possible to double the storage capacity fairly cheaply.

400
Edited by RaisedCorvis - 4/12/12 at 8:09am
post #2 of 11
I don't think so.

The Firmware would have to be flashed to that of the larger capacity drive and I'm not sure if the ECC will allow for it.
 
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post #3 of 11
Thread Starter 
I am not sure if the firmware would need to be flashed. I was searching on OCZ's support forums and from what I have seen there it seems that there is one firmware across all of the RevoDrives of that series (Series meaning if it is an RevoDriveX2 ect. ect.).

There might be other pullup, pull down resisters that would need to be populated or unpopulated. If the firmware is the same and the only difference between RevoDrives of the same series is the quantity of memory chips, it might be possible. All of the traces and pads are there on the PCB as well. Intel 29F32G08AAMDB is the type of memory it uses. I have not been able to find any datasheets for this nor can I confirm how much it would cost to by 10 of them (for a 40gb upgrade).

I think I am willing to take a risk to see what would happen.
post #4 of 11
You'll need a hot air station, otherwise forget it.

edit:

Just a few more thoughts... Even if you are successful in attaching the addition chips, they may not be recognized because 1) original board assembly does not contain the additional support components (caps/resistors/logic, etc.), and 2) newer firmware may be required. So, just something to think about before moving forward.
Edited by gymenii - 4/12/12 at 2:56pm
post #5 of 11
Thread Starter 
I have the equipment. I am an electrical engineer experienced in board design so I have thought about those things. As I said above, it appears to be the same firmware across the revodrive series. From what I can tell on mine, there arent any missing resisters (the PCB board has the traces and pads and silkscreen for everything that is missing). It is possible that there is a CPLD or some asic design that is different for each variant in capacity. But often this is not the case. If it were a different pcb layout between different capacities then it would be more of a risk.

It is still a risk and is why I posted this here hoping to find more information from users who have more experience/knowledge with RevoDrives. But I haven't found anyone who has attempted to do what I am proposing. If I do find a cheap supplier for the nand chips I will go ahead with it and let you guys know how it turns out.
post #6 of 11
Speaking as an ex-engineer myself... by design, the additional logic required to support the build specifications is limited to the board capacity. This is done to reduce manufacturing costs. Now, I don't own one or have one to look at (which would help) so its just my professional opinion. The PCB may in fact have all the support already built in without any further modifications. I hope you are successful smile.gif
post #7 of 11
I wish you luck!
Looks fairly tricky to myself, but it might be different for you.

Let us know how it turns out!
post #8 of 11
Is this magic you are speaking of?? Because it sounds cool. Subbing for sure
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post #9 of 11
revodrives are so cool. subbed
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post #10 of 11
Thread Starter 
Looking at it I dont think there any additional drivers or transceivers ect. Nand chips are quite easy to interface with and dont need addition logic.

The obvious question is how does it know to add more addresses. How does it know when it is full or close to full. Perhaps it is in the firmware flashing tool, it detects how much space there is and sets it in the firmware when it is flashed? or have they actually constructed a plug 'n play sort of thing. I dont know. I havent been able to find data sheets for the components on the RevoDrive otherwise I would have a better idea on these issues.

174
(edit: this image is for a revodrive x3)

I think that in terms of hardware, all that needs to be added is the nand chips. But it is a mystery what will happen from there. I suspect upon flashing it detects what storage is there and builds its tables. If that is the case that is easy to do. If there is an asic chip per capacity variant (which I find hard to believe) then this is impossible.

If anybody finds more information like datasheets or a more thorough understanding of how the Revodrive operates let me know!
Edited by RaisedCorvis - 4/13/12 at 7:14am
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