Sir

I am using sata hdd and my grub.conf shows

#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,5)
# kernel /vmlinuz-version ro root=/dev/sda9
# initrd /initrd-version.img
#boot=/dev/sda
default=2
timeout=15
splashimage=(hd0,5)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-8.el5)
root (hd0,5)
kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-8.el5.img
title CentOS (2.6.18-8.el5PAE)
root (hd0,5)
kernel /vmlinuz-2.6.18-8.el5PAE ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-8.el5PAE.img
title CentOS (2.6.18-8.el5xen)
root (hd0,5)


i understand the first title but what are the others.

pls explain my.

thanks in advance.

Second one looks like it's the Xen enabled kernel for virtualization.

thanks for ur reply

u r talkin abt the third one

kernel /vmlinuz-2.6.18-8.el5PAE ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-8.el5PAE.img
title CentOS (2.6.18-8.el5xen)
root (hd0,5)
but what is this for

kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-8.el5.img
title CentOS (2.6.18-8.el5PAE)
root (hd0,5)

Looks like it.
The second one is a PAE kernel - this is to allow you to use big memory on 32-bit systems. If you appear to be using less than all your installed memory (say only 2 Gig out of 4 installed), try the PAE kernel. As for that third entry, looks like it isn't complete, or is just a dummy entry (for a Xen kernel, had you chosen to install one).