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Re: Etch->Lenny upgrade gone bad

Hi Del,

* Del Merritt <del@alum.mit.edu> [2009-09-23 21:53]:
> I mentioned that I have a "good" Lenny slug.  I'm hoping there's a
> clever way for me to flash its vmlinuz (and anything else from the
> good Lenny install) to the former-Etch slug.

There is, although it remains to be seen whether it will help.

You can make a copy of your good machine with:
    cat /dev/mtdblock? > backup

and then upload that to your broken machine with:
    upslug2 -U -i backup

> I'm open to other suggestions; I haven't tried (yet) plugging my
> etch->lenny disk to the good lenny box; aside from MAC address and
> IP address, is there system-specific information in the flashed
> data?

The IP address is actually stored on disk, not in flash (at least in
case the Debian).  See /etc/network/interfaces

The MAC address is not stored in flash either.  However, the udev
rules will mention the MAC address to ensure it always uses the same
network name.  So when you plug your disk into the other NSLU2 you'll
have to adapt /etc/udev/rules.d/70-persistent-net.rules

Apart from that, it should work fine.

> In fact, I happen to have a third slug - still in box - and I'd love
> to have a clever way to clone one of the other two without having to
> go through the full Debian Installer (or the even slower aptitude
> [full|safe]-upgrade process).

It's actually pretty easy to clone a NSLU2:

 - tar up the whole disk and untar it to another disk with the same
   disk partition layout.
 - Edit /etc/network/interfaces (in case it has a static IP, rather
   than DHCP)
 - Edit /etc/udev/rules.d/70-persistent-net.rules
 - Make a copy of flash (as above) and write it to the other
   device (again, as above).

It's on my TODO list to write a HOWTO describing how to clone a NSLU2
but I'm not sure when I'll find the time.

> Sorry for a long first post here; I've had worry-free slug operation
> in the past, and thought I had the ducks in a row.  Thanks for any
> ideas,

No problem.  I hope you get it working.
Martin Michlmayr

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