Um? Kam187 Might Need your Thought's! Fastboot Working on BH2


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  1. BH_MAN

    BH_MAN Well-Known Member This Topic's Starter

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    Can anyone that Has Knowledge with Fastboot see if you can Run
    I recall Fastboot not working at All one Phone 1 & 2, but Phone 3 I can run Fastboot Commands.

    Not brave enough to Further test, the above command is fully safe to run btw!!!!
    This is Just wiping the Data / Cache from the Phone... I confirmed it working on my Phone!

    But need to see if it's working on other's Phone's as well..

    Here are some Pictures of it working...

    Right now I don't know, but I need People to see if they can access it.

    USB must be Plugged into Phone..... Volume up + Talk + End + Cube when Booting the Phone...
     

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  2. BH_MAN

    BH_MAN Well-Known Member This Topic's Starter

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    Okay... So it Does Look like It's Working But, Um not Really Doing anything. Going to PLay around with it more....

    Nevermind... This Post can be Deleted by a Mod if they want... Only Command it will Truly run in Fastboot is Fastboot -w which just wipe's your Cache & userdata...
     

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    tritran18518 likes this.
  3. kam187

    kam187 Well-Known Member

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    You could always go into fastboot, you just needed to get your timing exactly right, and start with the cable already in the phone.

    The most usefull part of fastboot - flashing, doesnt work because it can't understand the partition structure :( We tried it a long time ago, but no luck

    Unrelated, I noticed you are now able to flash a custom 'system' with odin. Was it just a matter of yaffsing up the system or something else? Its strange because flashing a galaxy system img onto the behold will brick it!

    Since we can flash kernel and system, why not recovery :)
     
  4. BH_MAN

    BH_MAN Well-Known Member This Topic's Starter

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    Fastboot Kinda understands... I played with it More last night before bed.

    fastboot erase Kernel ( Not Boot )
    It understands the Partition if you use the file name's like the BH2 uses.
    Recovery / Kernel / System all fail on a Security flag... But it was worth a try.

    i.e. Kernel / Recovery ... I tried erasing the Kernel in Post 2, said it erased fine but truly didn't.

    Regarding the Custom system.img, as long as you can get a Rom onto the Phone it's Just a matter of Pulling the System.img back Off. The hardest part in testing is No adb during boot up... But yes.. It's just a Matter of getting back into a Yauff file then I just yauff it to the system and proceed from there.

    I'm thinking they don't allow downgrading of the Recovery, Similar to how Moto Cliq don't allow downgrading of the Radio. Or, It's Signed somehow.
     
  5. Nu11u5

    Nu11u5 Well-Known Member Developer

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    The Behold 2 uses Samsung's proprietary file system RFS (Robust File System) instead of YAFFS2, and the tools to work with RFS images are licensed afaik. So instead you can just use the phone's built in support to build your image on it and 'dd' to dump it off the appropriate flash device.

    A Galaxy system image won't work because its in YAFFS2 (right?) and the Behold 2 does not have kernel support for that file system.

    A recompiled kernel could (and will probably have to) replace RFS with YAFFS2. The trick is we still don't know how to flash a custom recovery. There is probably some dependence between what Recovery writes to flash and how the kernel reads the devices - and including the GPL'ed LLD (Low Level Driver) in the builds might not be enough. I have a feeling XSR support will be required too.

    Basically saying that if we want to change the file system support in one, we should be prepared to have to do it in both Recovery and the kernel.

    References: SAMSUNG Semiconductor - Products - Flash - Flash Software
     

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