There is more to a bootdisk than a kernel image...
> rdev bzImage /dev/fd0
Change the kernel file to look for / (root fs) on /dev/fd0
This probably isn't what you want
> rdev bzImage 49152
You've got me with this one, it isn't a valid syntax, thought is seems to
interpret it as a major/minor pair and sets the root device to /dev/md2
(???) overriding the first command
> rdev -R bzImage 0
Mount root read-write
> dd if=/boot/bzImage of=/dev/fd0
copy the modified image to the floppy
OK, so you've now got a kernel on disk that will boot, and try to access
/dev/md2 as a root partition.
What you _need_ is a boot disk that not only has a kernel on it, but also a
compressed image of a root filesystem stored further on on the disk. There
are many bootdisk howtos out there that cover such creation, it is well
beyond the scope of this email :)
Unless you create a root image, though, you'll still need to mount / from
your hard disk (you need one from somewhere) and you still won't be able to
run partimage.
Personally, for a partimage boot disk, I use superrescue written by Peter
Anvin http://www.kernel.org/pub/dist/superrescue/v2/ - it is a 700Mb boot CD
image based on RedHat 7.2, complete with build instructions for tweaking it.
I removed KDE (I only use gnome) and added some toys such as partimage, so
mine fits on a 650Mb CD-RW - one of the most useful 'rescue disks' I've ever
possessed :)
-----Original Message-----
From: Tinu Patel [mailto:[EMAIL PROTECTED]]
Sent: 30 July 2002 15:36
To: [EMAIL PROTECTED]
Subject: Using rdev to create custom boot disk
Hi All,
I have a RH 72 server for which I would like to create a custom bootdisk
using rdev. The following are the steps I performed:
rdev bzImage /dev/fd0
rdev bzImage 49152
rdev -R bzImage 0
dd if=/boot/bzImage of=/dev/fd0
I need this bootdisk for using Parition Image for Linux, the standard
bootdisk (from partimage.com) does not work on my machine. The above
are instructions from partimage's website, when I use the disk I get the
following error:
invalid compressed format (err=2)
--system halted
The boot process hangs right there. This is the first time I am using
rdev and haven't understood completely the way is works, I didn't find
the man page helpful either.
Thanks
Tinu
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