Re: Which device did I boot from?

[Rene Herman]

William Estrada wrote:

> Is there a way to determine which device I have booted from?  For
> example, say I booted from a USB device, can I tell which one?  I did
> not find anything in /proc FS other than the cmdline options.

If you choose the (experimental) CONFIG_EDD option in your kernel then, 
with cooperation of your BIOS, you'll have a /sys/firmware/edd with at 
least some info about the BIOS boot device. For me:

/sys/firmware/edd/
`-- int13_dev80
    |-- extensions
    |-- info_flags
    |-- legacy_max_cylinder
    |-- legacy_max_head
    |-- legacy_sectors_per_track
    |-- mbr_signature
    |-- raw_data
    |-- sectors
    `-- version

I do not appear to have enough information there to be able to translate 
back to the linux device but drivers/firmware/edd.c seems to imply there 
might be for others. As far as I'm aware, it's the best that's available 
at least.

Rene.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/