【求助】升级2.4内核到2.6不能起动的问题???

安照 升级2.4内核到2.6不能起动的问题. 问题如下,请求帮助
# grub.conf generated by anaconda
#
# 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 (hd0,0)
# kernel /vmlinuz-version ro root=/dev/hdb3
# initrd /initrd-version.img
#boot=/dev/hdb
default=1
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz
title Red Hat Linux (2.6.11.10)
root (hd0,0)
#kernel /vmlinuz-2.6.11.10 ro root=LABEL=/(升级2.4内核到2.6后,默认生成)
kernel /vmlinuz-2.6.11.10 ro root=/dev/hdb1 elevator=deadline(安照 修改的)
initrd /initrd-2.6.11.10.img
title Red Hat Linux (2.4.20-8)
root (hd0,0)
kernel /vmlinuz-2.4.20-8 ro root=LABEL=/
initrd /initrd-2.4.20-8.img
title DOS
rootnoverify (hd0,4)
chainloader +1
grub.conf 文件内容如上, 但是没有办法起动,开机提示如下

VFS: cannot open root device "/dev/hdb1" or Unknown_block(0,0)
Please append a correct "root=" boot option
Kernel panic-not Syncing:VFS:unable to mount root fs on Unknown-block(0,0)
<7> Whci_hcd 0000:00:1f.4 Suspend-he

注: RH9 安装在 第一个IDE从盘的硬盘第一分区上　　　　　　
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