Boot error:

-----------------------------------------------------

root (hd0,0)
Filesystem type is ext2fs, partition type 0x83
kernel /vmlinuz-2.6.15.6 ro root=LABLE=/ rhgb quiet
   [Linux-bzImage, setup=0x1e00, size=0x1807f8]
initrd /initrd-2.6.15.6.img
   [Linux-initrd @ 0x37f82000, 0x6d283 bytes]

Uncompressing Linux... Ok, booting the kernel.
Red Hat nash version 4.1.18 starting
mkrootdev: label / not found
umount /sys failed:16
mount: error 2 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!
-------------------------------------------------------

搜集了网上提到的解决方法：

A. 修改grub.conf ==>  root=305
B. 修改grub.conf ==>  root=/dev/sdax
C. 修改grub.conf ==>  root=LABLE=/1
D. disable SMP
E. build-in ext3/SATA/ATA/SCSI
F. 根据现有/etc/modprobe，使用mkinitrd手动生成initrd-2.6.15.6.img

均无法解决，当前系统提示：

root (hd0,0)
Filesystem type is ext2fs, partition type 0x83
kernel /vmlinuz-2.6.15.6 ro root=LABLE=/ rhgb quiet
   [Linux-bzImage, setup=0x1e00, size=0x1807f8]
initrd /initrd-2.6.15.6.img
   [Linux-initrd @ 0x37f82000, 0x6d283 bytes]

Uncompressing Linux... Ok, booting the kernel.
Red Hat nash version 4.1.18 starting
mount: error 6 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!
-------------------------------------------------------------------

可能性：

1、scsi驱动不正确；

2、系统在没有完成设备检测前就开始挂载分区；

3、多硬盘引导。