用光盘安装ubuntu，硬盘AHCI模式，boot loader没有写进mbr，启动后提示：
[61.328000] ata1: COMRESET failed (errno=16)
[102.360000] ata1: COMRESET failed (errno=16)
[143.392000] ata1: COMRESET failed (errno=16)
Check root= bootarg cat /proc/cmdline
or Missing modules, devices: cat /proc/modules ls /dev
ALERT! /dev/disk/by-uuid/ does not exist. Dropping to a shell!
BusyBox v1.1.3 (Debian 1:1.1.3-4) ...
(initramfs)
fstab文件内容（# /dev/sda1 为xp盘，其他省略）：
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda5 8.8G menu.list就用的是这个uuid
UUID=cae38f2d-aa3f-4247-85ba-0393e38cf2d7 / ext3 defaults,errors=remount-ro 0 1
# /dev/sda6 2G
UUID=d36f1d8a-1705-4067-b13a-23601cbcb222 none swap sw 0 0
ls -l /dev/disk/by-uuid/内容
total 0
lrwxrwxrwx 1 root root 10 2008-03-28 00:19 4A0EE7AC6020AED3 -> ../../sda7
lrwxrwxrwx 1 root root 10 2008-03-28 00:19 5E76732FB5F4A241 -> ../../sda8
lrwxrwxrwx 1 root root 10 2008-03-28 00:19 6DB62528F6F9F115 -> ../../sda9
lrwxrwxrwx 1 root root 11 2008-03-28 00:19 BDBCE273099DEB80 -> ../../sda10
lrwxrwxrwx 1 root root 10 2008-03-28 00:19 cae38f2d-aa3f-4247-85ba-0393e38cf2d7 -> ../../sda5
lrwxrwxrwx 1 root root 10 2008-03-28 00:19 CE4477A344778D49 -> ../../sda1
lrwxrwxrwx 1 root root 10 2008-03-28 00:19 d36f1d8a-1705-4067-b13a-23601cbcb222 -> ../../sda6