Re: FW: [linux-usb-devel] boot from usb storage

Eric Lammerts (eric@lammerts.org)
Mon, 11 Nov 2002 14:10:36 +0100 (CET)


On Mon, 11 Nov 2002, Filipau, Ihar wrote:
> In short:
> Is it possible to boot from portable USB DVD drive?
> Is this supported in BIOSes?

Don't know.

> Will kernel be able to find a root?

Normally it doesn't work because USB devices are detectly
asynchronously (from a kernel thread). At the time a USB device is
discovered, the root mounting code has already given up.

I have a patch to fix this at
http://www.lammerts.org/software/kernelpatches/usb-storage-root.patch
It's tested only with USB harddisks, but will probably also work with
DVD drives.

Eric

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