LABEL in grub.conf

[Bill Matthews]

Hello,

I've been reading some of the other posts about restore procedures and
re-install grub.

One question I had is in /boot/grub.conf:

title Red Hat Enterprise Linux ES (2.4.21-27.0.1.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.4.21-27.0.1.ELsmp ro root=LABEL=/
        initrd /initrd-2.4.21-27.0.1.ELsmp.img

What is the "Label=/"?  How is it created, updated, etc?  It works
fine normally, but in some situations of changing drives, etc, it
seems to get messed up.  And I have to change root=/dev/sda1 or
whatever.

Thx,
BM