Re: devices for debian axp/sparc/ppc ?
Tom Dyas wrote:
> You would also want to add /dev/openprom to that list as well.
Oops, sorry I forgot it :-(
> > I need a device for nfs-root partition. Actually I use /dev/nfs declared
> > as
> > block device, major 0, minor 1, but I don't know if these attributes are
> > really used. Kernel documentation about nfsroot says that it's not a real
> > device but just a synonym to tell the kernel to use NFS instead of a real
> > device. To be able to boot via network on Sparc, I have to create this
> > device
> > on the server's mount point (I put it in a root.tgz image that looks like
> > root.bin from boot floppies).
> You shouldn't need to have a /dev/nfs. When you do a "root=/dev/nfs" on
> the kernel command line, the kernel just checks an array of device names.
> There is no attempt to open any userland file at all. See the routine
> parse_root_dev() in linux/init/main.c for more information.
Ok, but I don't pass root=/dev/nfs to the kernel. I just enter "boot net" at
monitor prompt to boot my Sparc over the network. Now I want to know which
device the client root partition is mounted from (local disk or nfsroot ?).
"block_device /" command can then return /dev/nfs if this device exists. It
can further be used to indicate if installation starts from a NFS mounted root
Furthermore, I want to see the root partition when I use mount command
(without arguments) and would want to manipulate it (mount -o remount...).
I'm not sure mount displays a block device if it does not exists?
A named block can help in this process, I guess.
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