Re: nfs-booting with a null-modem cable ?

1997-05-28 Thread Rob Browning
Alexandre Lebrun [EMAIL PROTECTED] writes:

 I'd like to set up my PPro to enable my 486 to boot nfs.
 looking at mknfsroot, this should be possible and perhaps easy with eth 
 cards.

If you're talking about the 486 booting from an nfs mounted root on
your PPro machine, I think you may need an ethernet card with special
boot ROMs.  Though I'm no expert in this area, so I could be wrong.

If you're just talking about having a small hard drive in the 486 and
nfs mounting stuff after it comes up, then that's easy, you can do
that with the modem cable, or with ethernet.  With the modem cable
approach, you'll need ppp, and will be limited to about 10k/s.

You should browse the HOWTO index.  There's a HOWTO on PPP, and one (I
think) on net booting.  You can reach the HOWTO index from any Debian
web site mirror (www.debian.org).

-- 
Rob


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Re: nfs-booting with a null-modem cable ?

1997-05-28 Thread Bruce Perens
From: Rob Browning [EMAIL PROTECTED]
 If you're talking about the 486 booting from an nfs mounted root on
 your PPro machine, I think you may need an ethernet card with special
 boot ROMs.

Not nearly so difficult, he can use a floppy drive.
You can load the kernel from floppy and have it mount an NFS root.
SysLinux would be best for this.

On a Debian system:

Put a formatted floppy in the first floppy drive.
Unzip /usr/lib/syslinux/img1440.gz to the raw floppy, /dev/fd0.
Mount the floppy as an MSDOS filesystem, and copy the kernel
 on to it.
Edit SYSLINUX.CFG to add the NFS root parameters to the boot
 command line. See the file /usr/src/linux/Documentation/nfsroot.txt,
 you will have to install the kernel-source package if you have not
 done so.

That should work fine.

Thanks

Bruce
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Re: nfs-booting with a null-modem cable ?

1997-05-28 Thread Rob Browning
[EMAIL PROTECTED] (Bruce Perens) writes:

 Not nearly so difficult, he can use a floppy drive.  You can load
 the kernel from floppy and have it mount an NFS root.  SysLinux
 would be best for this.

I presume that this will only work if you're using NFS over something
like ethernet (not that nfs would be really tolerable over a 115K PPP
serial port connection anyway).

Thanks
-- 
Rob


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Re: nfs-booting with a null-modem cable ?

1997-05-28 Thread Bruce Perens
Bruce:
 Not nearly so difficult, he can use a floppy drive.  You can load
 the kernel from floppy and have it mount an NFS root.  SysLinux
 would be best for this.

From: Rob Browning [EMAIL PROTECTED]
 I presume that this will only work if you're using NFS over something
 like ethernet (not that nfs would be really tolerable over a 115K PPP
 serial port connection anyway).

Oops. Right - he wants to use PPP. Sorry, my answer _was_ specific to
Ethernet.

You'd need to use INITRD. That's a good deal harder, but do-able. You would
have to load a small root filesystem, start up PPPD, mount the new root
filesystem, and then exit the initrd. See
/usr/src/linux/Docuemntation/initrd.txt .

Thanks

Bruce
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Re: nfs-booting with a null-modem cable ?

1997-05-28 Thread Nils Rennebarth
-BEGIN PGP SIGNED MESSAGE-

On Tue, 27 May 1997, Bruce Perens wrote:
Oops. Right - he wants to use PPP. Sorry, my answer _was_ specific to
Ethernet.

You'd need to use INITRD. That's a good deal harder, but do-able. You would
have to load a small root filesystem, start up PPPD, mount the new root
filesystem, and then exit the initrd. See
/usr/src/linux/Docuemntation/initrd.txt .
Sven Rudolph did an awful good job on the Boot/Root/Rescue Disks.

Starting from the Debian Rescue disk the mentioned task should not take
much work. It is possible to make the ramdisk bigger so that a full libc
can be used, and a lot of stuff that is needed for installation only could
be thrown away to make room for pppd etc. Also a custom kernel with the
serial driver compiled in might save some bytes (with the side effect that
booting probably also will be faster because less devices are probed)

Nils

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nfs-booting with a null-modem cable ?

1997-05-26 Thread Alexandre Lebrun
I'd like to set up my PPro to enable my 486 to boot nfs.
looking at mknfsroot, this should be possible and perhaps easy with eth 
cards.

But I only have a null-modem cable.
Is it still possible ? with what packages?

Other possibilities would be:
-getting 2 more netcards
-installing linux on a small partition (I would not need X).

But it's probably more fun the complicated way.

other: I could get an 2nd IP address or use masquerading. I think a 2nd 
IP is easier, and we still have some on the subnet. Any comments ?

Alexandre


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