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Or is the documentation just very outdated there?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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