how to understand this boot option?

[lin q]

Hi,
  My machine has Fedora Core 1 installed and its grub.conf is like this,

default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Fedora Core (2.4.22-1.2115.nptl)
	root (hd0,0)
	kernel /vmlinuz-2.4.22-1.2115.nptl ro root=LABEL=/12 ide=nodma rhgb
	initrd /initrd-2.4.22-1.2115.nptl.img

  It is really hard for me to interprete "root=LABEL=/12 ".

  Normally what I see is like, "root=/dev/hda1 LABEL=/" which makes sense to 
me. But the above is hard to read.

  What is the value of "root" and "LABEL"? What "/12" mean?

Thanks.

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[Endy]

lin q wrote:

>  Hi,
>   My machine has Fedora Core 1 installed and its grub.conf is like this,
>
>  default=0
>  timeout=10
>  splashimage=(hd0,0)/grub/splash.xpm.gz
>  title Fedora Core (2.4.22-1.2115.nptl)
>      root (hd0,0)
>      kernel /vmlinuz-2.4.22-1.2115.nptl ro root=LABEL=/12 ide=nodma rhgb
>      initrd /initrd-2.4.22-1.2115.nptl.img
>
>   It is really hard for me to interprete "root=LABEL=/12 ".
>
>   Normally what I see is like, "root=/dev/hda1 LABEL=/" which makes 
>  sense to me. But the above is hard to read.
>
>   What is the value of "root" and "LABEL"? What "/12" mean?
>
>  Thanks.
>
>  _________________________________________________________________
>  Express yourself instantly with MSN Messenger! Download today - it's 
>  FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
>  
are there multiple partitions? udev will set labels such as /1 and /2 
for different / partitions to differentiate them, i think.

[Kevin Freeman]

On Sun, 2005-04-24 at 21:34 -0600, lin q wrote:
>  Hi,
>    My machine has Fedora Core 1 installed and its grub.conf is like this,
>  
>  default=0
>  timeout=10
>  splashimage=(hd0,0)/grub/splash.xpm.gz
>  title Fedora Core (2.4.22-1.2115.nptl)
>  	root (hd0,0)
>  	kernel /vmlinuz-2.4.22-1.2115.nptl ro root=LABEL=/12 ide=nodma rhgb
>  	initrd /initrd-2.4.22-1.2115.nptl.img
>  
>    It is really hard for me to interprete "root=LABEL=/12 ". 
This syntax means "root filesystem is the one with label of /12."  It
requires initrd support.  This allows one to add/delete partitions and
add or move drives and still have a working system without modifying
root=... in grub.conf.  Of course, you still have to manually make sure
the grub boot sector and "root (...)" line of grub.conf still point to
the right partition.

#man e2label 
Will explain how to label ext2/3 partitions.

Regards,
Kevin