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ClockworkMod (CWM) Recovery easy install for RK3066 and RK3188 -- TWRP/CWM Flash-Tool and root for RK3288

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Arnova 7cG2 Rooted
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duryard
Exeter, Devon, UK
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2012/01/06 - 18:17
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I dont uderstand why it worked once then not again?

I assume that I cant do the 7G2 firwamre on the 7cG2?

Not tried the z4root yet.

Tried doomlord and that does not work either.

I think its a driver problem but how do you install the drivers?

Ginger break just sat thinking about it for 30 min and I had to reset:(

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alex
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2012/01/06 - 18:30
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sometimes it can take ages to work the same happened to me i used SOC and it rooted i tested it in terminal on tablet typed su and it gave me permission it then froze so i had to reset it then  the root was gone and i could not do it again... wierd

"The best person in the world, at the moment" -imstookatboot

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finless
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2012/01/06 - 18:50
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Having rooted the 10 G2 and the 7 G2 now I find it hard to believe Arnova would setup the firmware on the 7c G2 in a completely different way.  On both the 7 G2 and the 10 G2 /system is a cramfs file system.  A cramfs file system is READ ONLY no matter if you get SU access or not.  It would have to be a ext3 file system to be able to write to it. Since so far it looks like all the G2's have cramfs, again it would suprise me very much if the 7c G2 was truely different.

This might explain why you guys are loosing root after a reboot, locking up, etc.  DanielVD, even though you think you wrote /system it could be the rooting tool made a symbolic link to local/data or /data/system or something like that.  This also might explain on reboot stuff is gone.  Again when I first got my 10 G2 I tried using that same tool.  It said it was successful.  Alas, in truth it was not a full root.

 

The only way we will know for sure is to look and the init.rc file.  When one of you guys gets su access again please use a file explorer (ES File explorer will do if you don't want to pay for Root Explorer) and copy out the init.rc file that is at the root file structure /.  Post it's contents and we will have a look.

 

Bob

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DanielVd

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2012/01/06 - 18:51
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If you can't root do an hard reset.

Now i am working for a porting of a custom recovery, i am using a guide wirtten by the creator of clockwork recovery, i hope that it will works.


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DanielVd

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2012/01/06 - 18:54
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finless said

Having rooted the 10 G2 and the 7 G2 now I find it hard to believe Arnova would setup the firmware on the 7c G2 in a completely different way.  On both the 7 G2 and the 10 G2 /system is a cramfs file system.  A cramfs file system is READ ONLY no matter if you get SU access or not.  It would have to be a ext3 file system to be able to write to it. Since so far it looks like all the G2's have cramfs, again it would suprise me very much if the 7c G2 was truely different.

This might explain why you guys are loosing root after a reboot, locking up, etc.  DanielVD, even though you think you wrote /system it could be the rooting tool made a symbolic link to local/data or /data/system or something like that.  This also might explain on reboot stuff is gone.  Again when I first got my 10 G2 I tried using that same tool.  It said it was successful.  Alas, in truth it was not a full root.

 

The only way we will know for sure is to look and the init.rc file.  When one of you guys gets su access again please use a file explorer (ES File explorer will do if you don't want to pay for Root Explorer) and copy out the init.rc file that is at the root file structure /.  Post it's contents and we will have a look.

 

Bob

How can i look the contents.

I post the file: http://www.megaupload.com/?d=ATSQZSD8

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finless
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2012/01/06 - 19:05
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I downloaded the file.  You copied out the wrong one.  There is init and there is init.rc

I need the init.rc file

 

Bob

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DanielVd

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2012/01/06 - 19:09
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finless said

I downloaded the file.  You copied out the wrong one.  There is init and there is init.rc

I need the init.rc file

 

Bob

ok this is the file 😉 http://www.megaupload.com/?d=ZH0Q63UK

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finless
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2012/01/06 - 19:39
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OK you are correct. I was wrong... Why Arnova did something different for the 7c G2 is beyond me!

The file systems are all YAFFS2 and those can be written to!

 

Here is the mount commands from the init.rc file

mount yaffs2 mtd@system /system

#mount yaffs2 mtd@system /system ro remount

mount yaffs2 mtd@userdata /data nosuid nodev

mount yaffs2 mtd@persist /persist nosuid nodev

mount yaffs2 mtd@cache /cache nosuid nodev

mount yaffs2 mtd@persist /persist nosuid nodev

mount yaffs2 mtd@content /content nosuid nodev

I do not know if the rooting tool commented out the read only mount of /system or if it came that way.  But it is commented out and a the mount of /system leaves it r/w

 

Enjoy your root!  Looks like no new ROM is needed to get r/w to /system on the 7c G2.

Bob

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DanielVd

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2012/01/06 - 19:41
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finless said

OK you are correct. I was wrong... Why Arnova did something different for the 7c G2 is beyond me!

The file systems are all YAFFS2 and those can be written to!

 

Here is the mount commands from the init.rc file

mount yaffs2 mailto:mtd@system) i hope it will works

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admin

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2012/01/06 - 19:43
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finless said

OK you are correct. I was wrong... Why Arnova did something different for the 7c G2 is beyond me!

The file systems are all YAFFS2 and those can be written to!

 

The Arnova 7c G2 is totally different to the other G2 devices, it is based on a Qualcomm architecture, not Rockchip.

/blog/featured/arnova-7c-g2-quick-photo-review/

If you like our web site, applications and firmwares, feel free to support our site. Donations are used to pay the bills for our server hosting costs, development tools and purchase new tablets to support.

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finless
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2012/01/06 - 19:52
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However there are some things in init.rc that would make it even better and no root tool required!

Of course these means making a new boot.img and flashing it.

 

For instance,

The mounting of the other partitions is nosuid and nodev.  Those could be removed.

 

Also after fs init, they change rootfs to ro this could be fixed.

  on post-fs
  # once everything is setup, no need to modify /

  mount rootfs rootfs / ro remount

  # We chown/chmod /data again so because mount is run as root + defaults

  chown system system /data

  chmod 0771 /data

 

And finally to unlock ADB this could be changed from =0 to =1

  on property:ro.secure=0

  on property:persist.service.adb.enable=0

 

Then finally the added comands like

  chmod 6775 su

  chmod 777 /system

 

Then no tool would be needed.  But the down fall is you have to flash a rom.

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finless
Stanton, Ca

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2012/01/06 - 19:57
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Ah OK Admin.... I did not know that.  I figured they were all rockchip.  That explains it then.

 

I wonder if rockchip or the 7,9,10 G2 can support yaffs2? in /system/bin I do not see yaffs like I do cramfs...  Yaffs would be better for the NAND chip as it writes data in pages and cleans up NAND well.  Yaffs is made specifically to perform well for NAND memory.

Hmmmm only one way to find out 😉

I think I will see if I can find the sources and compile it or of there is already a bin for RK29.

A project for another day....

 

Bob

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DanielVd

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2012/01/06 - 20:05
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finless said

However there are some things in init.rc that would make it even better and no root tool required!

Of course these means making a new boot.img and flashing it.

 

For instance,

The mounting of the other partitions is nosuid and nodev.  Those could be removed.

 

Also after fs init, they change rootfs to ro this could be fixed.

  on post-fs
  # once everything is setup, no need to modify /

  mount rootfs rootfs / ro remount

  # We chown/chmod /data again so because mount is run as root + defaults

  chown system system /data

  chmod 0771 /data

 

And finally to unlock ADB this could be changed from =0 to =1

  on property:ro.secure=0

  on property:persist.service.adb.enable=0

 

Then finally the added comands like

  chmod 6775 su

  chmod 777 /system

 

Then no tool would be needed.  But the down fall is you have to flash a rom.

whit this how can i do? sorry but i am italian ...Embarassed

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finless
Stanton, Ca

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2012/01/06 - 20:30
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You cant without making a boot.img or a new ROM.  Even if you go in now and edit the init.rc then on next reboot it will use the init.rc from boot.img and overwrite your edits.  So you have to edit init.rc in boot.img, make a new ROM then flash it.

Problem is, Arnova has not released a update.img and no one has dumped the ROM so no way for me right now to make a new ROM for it.

 

Bob

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Alex9000
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2012/01/06 - 20:40
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finless said

You cant without making a boot.img or a new ROM.  Even if you go in now and edit the init.rc then on next reboot it will use the init.rc from boot.img and overwrite your edits.  So you have to edit init.rc in boot.img, make a new ROM then flash it.

Problem is, Arnova has not released a update.img and no one has dumped the ROM so no way for me right now to make a new ROM for it.

 

Bob

 

 

i am in possession of a ROM for ARNOVA 7c G2 3G ... if you can help tell me where to post it ... and i place.

 

Ciauz

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