Hi，all：
PC支持硬raid，将两个500g的硬盘做了个RAID 1镜像。安装ubuntu 12.04时将grub安装在/dev/mapper/isw_dfciehgfed_Volume0.
安装后机器启动就出现“Invalid Partition Table！”的错误然后停在哪里，如果按ESC或F5可以跳过这个错误，然后ubuntu就能正常启动了。
感觉系统已经安装在raid盘上了 ，只是这个错误很烦人，每次启动都要人工干预，所以请教大家如何解决。硬盘信息：
代码:
# fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000edbe5
Device Boot Start End Blocks Id System
/dev/sda1 2048 943368191 471683072 83 Linux
/dev/sda2 943370238 976766975 16698369 5 Extended
Partition 2 does not start on physical sector boundary.
/dev/sda5 943370240 976766975 16698368 82 Linux swap / Solaris
Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000edbe5
Device Boot Start End Blocks Id System
/dev/sdb1 2048 943368191 471683072 83 Linux
/dev/sdb2 943370238 976766975 16698369 5 Extended
Partition 2 does not start on physical sector boundary.
/dev/sdb5 943370240 976766975 16698368 82 Linux swap / Solaris
Disk /dev/mapper/isw_dfciehgfed_Volume0: 500.1 GB, 500104826880 bytes
255 heads, 63 sectors/track, 60800 cylinders, total 976767240 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x000edbe5
Device Boot Start End Blocks Id System
/dev/mapper/isw_dfciehgfed_Volume0p1 2048 943368191 471683072 83 Linux
/dev/mapper/isw_dfciehgfed_Volume0p2 943370238 976766975 16698369 5 Extended
Partition 2 does not start on physical sector boundary.
/dev/mapper/isw_dfciehgfed_Volume0p5 943370240 976766975 16698368 82 Linux swap / Solaris
Disk /dev/mapper/isw_dfciehgfed_Volume0p1: 483.0 GB, 483003465728 bytes
255 heads, 63 sectors/track, 58721 cylinders, total 943366144 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/isw_dfciehgfed_Volume0p1 doesn't contain a valid partition table
fdisk: unable to read /dev/mapper/isw_dfciehgfed_Volume0p2: Inappropriate ioctl for device
root@kr:~# mount
/dev/mapper/isw_dfciehgfed_Volume0p1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
gvfs-fuse-daemon on /home/x/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=x)
谢谢！
Regards，
soar
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