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Mirco

Mirco

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  • Posts: 1
  • Member Since: 21 Dec 12
  • Last Logged In: 21 Dec 12

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    Flash NAND Ram is mounted ISO9660
    As widely known some G3 hsdpa modems come with a switch mode, means we can change the ID in such a way that it appears either as a modem or a cdrom. On debian-testing I can turn that switch by changing the truth value of DisableSwitching in the file /etc/usb_modeswitch.conf The problem is, that if DisableSwitcing=true, the hardware NAND-flash memory appears as a write protected cdrom. That might be what the vendors want, but on a physical level this is not correct, since it is definitely write-able from a hardware POV. You can see that because some producers ship firmware and "branding"-updates and vendors put their vendor stuff into that RAM. So, also it is RAM not ROM, it is mounted as the latter. Is this a bug? At least on my hsdpa-modem there are 100MB RAM. Enough for a tiny OS and I really would like to know how we can mount it writeable. Any suggestions? Please let me know, what data you need to help me on that problem...
    Link to this post 21 Dec 12

    As widely known some G3 hsdpa modems come with a switch mode, means we can change the ID in such a way that it appears either as a modem or a cdrom.

    On debian-testing I can turn that switch by changing the truth value of DisableSwitching in the file /etc/usb_modeswitch.conf

    The problem is, that if DisableSwitcing=true, the hardware NAND-flash memory appears as a write protected cdrom. That might be what the vendors want, but on a physical level this is not correct, since it is definitely write-able from a hardware POV. You can see that because some producers ship firmware and "branding"-updates and vendors put their vendor stuff into that RAM. So, also it is RAM not ROM, it is mounted as the latter.

    Is this a bug?

    At least on my hsdpa-modem there are 100MB RAM. Enough for a tiny OS and I really would like to know how we can mount it writeable. Any suggestions?

    Please let me know, what data you need to help me on that problem...

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