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I'm trying to find out something about the inner workings of the DSM software and how jun's hack works. I extracted the pat file of a 918+ and looking around. There is a rd.gz file, which should be the ramdisk and the tool binwalker says that it is LZMA compressed. However, I cannot unpack the ramdisk neither can I mount it.

 

Can someone tell me how I can open the file?

And while I'm at it: Is there any website or post that explains how the boot process of the filestation works?

 

Thank you for your help!

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On 1/13/2020 at 6:26 PM, qwert_wayne said:

There is a rd.gz file, which should be the ramdisk and the tool binwalker says that it is LZMA compressed. However, I cannot unpack the ramdisk neither can I mount it.

zImage and rd.gz on the loader (2nd partition) are original synology and will be  copied, on updating dsm, to the loader

you can unpack rd.gz using 7zip, let it unpack to folder rd, ignore the error, inside the folder will be the file"rd", let 7zip unpack the same way and you will have the content

start with "linuxrc.syno"

if you want to know about what jun does then you need to start with the loader and look into the extra.lzma

if you are familiar with revers engineering you can take apart modprobe

 

also i'd suggest to read jun's comments, there are some information he gave here an there

 

 

 

 

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