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Old 02-08-2007, 09:12 PM   #1
Hotchips
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Registered: Nov 2006
Location: Brisbane, Australia
Distribution: RHEL4
Posts: 29

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creating boot floppy from RHEL 4 ES system


Hi all,

I have looked around these forums and google but am still unable to find a simple solution to what I would have thought was a simple request.

I want to create a boot diskette.

I have tried....

Creating diskette from images on CD1 - all images are above 1.4MB so no good. I believe RHEL 3 had image for floppy. RHEL 4 no longer seems to support this function?

running command....
mkbootdisk --device /dev/fd0 `uname -r`

I get...
mkbootdisk --device /dev/fd0 `uname -r`
Insert a disk in /dev/fd0. Any information on the disk will be lost.
Press <Enter> to continue or ^C to abort:
cp: writing `/tmp/mkbootdisk.kT3612/vmlinuz': No space left on device
cp: writing `/tmp/mkbootdisk.kT3612/initrd.img': No space left on device
cat: write error: No space left on device
cat: write error: No space left on device
20+0 records in
20+0 records out


This does not create a boot floppy I can use. Goes to a boot prompt and asks for input. What is needed here I am not sure. I think it wants what was not written to floppy due to space. Can someone clarify this please?

I have looked on RedHat site as well but there is not clear instruction to creating a boot disk. I have a RHEL3 RHCE prep book that goes through creating a floppy but I am unable to do it.

Advice would be appeciated.


UPDATE

Don't worry. Booting from floppy is no longer supported for RHEL 4 according to official RedHat course material.

Last edited by Hotchips; 02-08-2007 at 10:25 PM.
 
Old 02-09-2007, 06:29 AM   #2
Lenard
Senior Member
 
Registered: Dec 2005
Location: Indiana
Distribution: RHEL/CentOS/SL 5 i386 and x86_64 pata for IDE in use
Posts: 4,790

Rep: Reputation: 56
Yep, the kernel is now to large to fit on a 1.44MB floppy but you can create a boot CD image that will also work if you have usb memory and the kernel/system supports booting from usb.

mkbootdisk --iso --device boot.iso 2.6.20-git1

$ ls -hal boot*
-rw-r--r-- 1 root root 4.7M Feb 9 07:25 boot.iso

The rescue boot image on the installation media is also a good boot image to have handy on a separate boot media also.
 
Old 02-10-2007, 05:17 PM   #3
Hotchips
LQ Newbie
 
Registered: Nov 2006
Location: Brisbane, Australia
Distribution: RHEL4
Posts: 29

Original Poster
Rep: Reputation: 15
Bugger, now I do have a prob.

I cannot boot from CD. BIOS set to boot cd before hdd but fails to, when I interrupt and enter boot menu and select cdrom, cannot read it....
strike F1 to retry or F2 to enter setup.

I want to try to extend my root filesystem. My plan was to go into rescue mode, unmount it, resize the partition and remount it. I can no longer bnoot off the cd so might need that damn boot floppy after all. I also need to configure a 'kickstart' floppy. I assume this means I need to create a boot floppy and add a kickstart file to it???

Any suggestions anyone?

Cheers,
 
Old 02-10-2007, 05:25 PM   #4
Lenard
Senior Member
 
Registered: Dec 2005
Location: Indiana
Distribution: RHEL/CentOS/SL 5 i386 and x86_64 pata for IDE in use
Posts: 4,790

Rep: Reputation: 56
It means you need to read the manuals for creating a kickstart CD. If you really are having problems booting from the CD/DVD drive then see and try;

http://linux.simple.be/tools/sbm

One can also build a grub boot floppy, google for the info.
 
  


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