Le 01/11/2010 01:52, Goh Lip a écrit :
On Monday 01,November,2010 05:43 AM, Nicolas de Pesloüan wrote:
Hi,
First post here, but I checked the archive first, without success.
On Linux, I use an USB device that provide a 3G "modem" and a slot for a
micro SD card.
Because this device use the ZeroCD technology, I need to use
usb-modeswitch to switch the device from its native mode (being seen as
a CD reader) to its operational mode (being seen as a serial device + a
storage device).
I would like to be able to use GRUB2 to boot from this device.
Unfortunately, GRUB2 is unable to use it, as the device is not seen as a
storage device until switched.
It would be really convenient to be able to switch the device from
inside GRUB2. Switching is done by sending a message into an USB bulk
endpoint. Having already most of the USB work done for normal GRUB2
operation, I assume this should not be a major work.
Any comments ?
Have not used or tried usb-modeswitch myself, but would comment #9 of
https://bugs.launchpad.net/ubuntu/+source/usb-modeswitch/+bug/477031
help?
Unfortunately, not.
To clarify:
The device works perfectly if a boot from a hard disk and use usb_modeswitch. So I don't have any
problem with the device, except the fact that I cannot boot from the micro SD integrated into the
device.
Being able to boot from this device would provide a tiny but powerful portable environment, with
full featured operating system, data storage and remote access using 3G connection.
As the device is seen as a virtual CD reader before switching, I imagine "virtually burning" an El
Torito bootable ISO image into it. This ISO image would only include a GRUB2 image, that would
switch the device from ZeroCD to storage+modem and boot (chainload ?) from the integrated micro SD.
Hence the need to be able to switch the device from inside GRUB2.
Anyway, thanks for your reply.
Nicolas.
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