How to get the rootfs of a good Kindle Paperwhite 2 ?

[Mr.Samuel]

Is there any way to get the rootfs of a good Kindle Paperwhite 2 in case of broken?

[eschwartz]

Use KindleTool to pry open Amazon's firmware update package. It has the complete rootfs.

[Mr.Samuel]

Is "fwo_rootfs.img" the right file?

[NiLuJe]

kindletool extract ~/Downloads/update_kindle_paperwhite_v2_5.7.4.bin PW2                                                                                                                 
Extracting update package '/home/niluje/Downloads/update_kindle_paperwhite_v2_5.7.4.bin' to 'PW2'.
Bundle         SP01 (Signing Envelope)
Cert number    2
Cert file      pubprodkey02.pem (Official 2K)
Bundle         FB03 (Fullbin [OTA?, fwo?])
Bundle Type    Recovery V2
Target OTA     2929620018
MD5 Hash       3a2ab572de41a3f7dd79d512f63c2bda
Magic 1        2048630901
Magic 2        1897089723
Minor          1
Platform       Wario
Header Rev     0
Board          Unspecified
Devices        14
Device         Kindle PaperWhite 2 (2013) (Unknown Variant 0xF4)
Device         Kindle PaperWhite 2 (2013) (Unknown Variant 0xF9)
Device         Kindle PaperWhite 2 (2013) WiFi+3G Japan
Device         Kindle PaperWhite 2 (2013) WiFi+3G Russia
Device         Kindle PaperWhite 2 (2013) WiFi+3G Europe
Device         Kindle PaperWhite 2 (2013) WiFi+3G Canada
Device         Kindle PaperWhite 2 (2013) WiFi+3G
Device         Kindle PaperWhite 2 (2013) WiFi
Device         Kindle PaperWhite 2 (2013) WiFi+3G (4GB)
Device         Kindle PaperWhite 2 (2013) WiFi+3G (4GB) Brazil
Device         Kindle PaperWhite 2 (2013) WiFi+3G (4GB) Europe
Device         Kindle PaperWhite 2 (2013) WiFi+3G (4GB) Canada
Device         Kindle PaperWhite 2 (2013) WiFi Japan
Device         Kindle PaperWhite 2 (2013) WiFi (4GB) International
x update-payload.dat
x imx60_wario/uImage
x imx60_wario/uImage.sig
x rootfs.img.gz
x rootfs.img.gz.sig
x update-payload.dat.sig

[eschwartz]

I believe I heard that on Windows the rootfs.img.gz is extracted as fwo_rootfs.img instead?

[NiLuJe]

Huh. Indeed, the original filename is stored in the gzip header!
Never realized that .

[eschwartz]

@Mr.Samuel,

Also, you will have to find some way to view a linux-native (ext) partition image.
On linux that is obviously dead easy. On OSX it is supposed to be practically impossible to get an ext4 driver?
Not sure what the state is on Windows.

[geekmaster]

Originally Posted by eschwartz

@Mr.Samuel,

Also, you will have to find some way to view a linux-native (ext) partition image.
On linux that is obviously dead easy. On OSX it is supposed to be practically impossible to get an ext4 driver?
Not sure what the state is on Windows.

I mount .img files using "ImDisk Virtual Disk Driver": http://www.ltr-data.se/opencode.html/#ImDisk

I also have an EXT IFS driver installed in my Win7 x64 box, so I can read and write files on EXT2/3/4 partitions directly (just like NTFS or FAT32). Though weird things happend when a directory contains filesnames that are the same when case is ignored (such as in Windows). It also has problems with symlinks. But still, good for casual browsing. When it fails me, I loop mount the image file in my linux mint VM instead (which is pretty much always open these days). Also, I do not have an easy way in Windows to mount and view squashfs or jffs2 partition images (which I have been encountering more frequently) so my linux VM is rapidly becoming my "go to" tool for kindle development. I think it is about time to put linux as my main boot OS (relegating windoze to a VM) on this laptop, eh?