Hello John,

As I understand things SystemImager is able to work on different 
hardware platforms - in a way. There's definitely a need for some 
hacking / overlay scripts involved.... but I'm attempting to do much the 
same in our environment. So far I'm having some success, although this 
is all new to me so there's definitely some learning curve...

Would be helpful if you could explain some more about udev and your 
theory... perhaps you could present some proof of concept tests for the 
rest of us? Would be greatly appreciated if you knew a simple way of 
performing this kind of operation.

Jason

John Goerzen wrote:
> Hello,
>
> I have just started reading about SystemImager.  In the manual, there
> are a lot of warnings that you can only use an image on identical
> hardware.  However, I can't figure out why there would be such a
> restriction.
>
> With hardware autodetection (thanks to udev) and comprehensive
> initrd systems in modern Linux distributions, I don't think it really
> matters all that much.  I can take a single kernel (with its initrd
> and modules) and boot it up on all sorts of machines.  They don't have
> to have the same type of network card, disk controller, etc.
>
> So why would SystemImager require the same type of network card?
> Surely the initrd would load the module for the network card before
> SystemImager ever gets to run?  As long as it's still eth0,
> SystemImager should be happy, right?
>
> The only problem I can think of is differeng names for hard disk
> devices.  /dev/hda on IDA systems vs. /dev/sda on SCSI or SATA ones,
> for instance.  But even that can be worked around trivially.  A udev
> rule could automatically assign symlinks to the primary disk in the
> system.
>
> Or, with LVM support in initrds, by the time SystemImager boots,
> /etc/fstab can be the same everywhere.  (The only trick would be at
> install time to partition the correct disk)
>
> So it seems that most things would just work, and really the only
> diverging thing would be hard disks.  And even that can be worked
> around pretty easily.
>
> So, what am I missing?
>
> Or is the documentation just very outdated there?
>
> Thanks,
>
> -- John
>
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Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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