到目前为止,这是我所拥有的：

>我成功地使用新驱动器降级了raid 1,我复制了它上面的所有数据
>我可以挂载该raid 1,查看其文件等
>我已经有一个raid5正在同一个盒子上工作(虽然没有在它上面启动)
>我已在两个驱动器上安装了grub
>当grub启动时,它会加载内核,但在内核启动期间无法加载“根块设备”

内核告诉我：
1 – 检测到根设备是md设备
2 – 确定根设备
3 – 安装根
4 – 安装/ dev / md125 on / newroot失败：输入/输出错误.请输入另一个根设备：…

此时,如果我输入/ dev / sda3(我的“旧”根设备尚未转换为raid),一切都在没有root的情况下正常启动.确实创建了/ dev / md125设备,但它似乎是在错误发生后创建的,因为它在加载mdadm时加载设备后创建它.

不知何故,看起来它不能/不加载raid数组才需要挂载它,我不知道如何解决这个问题.

我的配置文件(一旦用sda3作为根设备启动,就从系统中获取)：

$cat /etc/mdadm.conf
ARRAY /dev/md/md0-r5 Metadata=0.90 UUID=1a118934:c831bdb3:64188b84:66721085
ARRAY /dev/md125 Metadata=0.90 UUID=48ec4190:a80d4dde:64188b84:66721085

$cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [raid0] [raid10]
md125 : active raid1 sdc3[1]
      477853312 blocks [2/1] [_U]

md127 : active raid5 sdd[0] sdf[3] sdb[2] sde[1]
      4395415488 blocks level 5,64k chunk,algorithm 2 [4/4] [UUUU]

unused devices: <none>

$cat /boot/grub/menu.lst
default 0
timeout 8
splashimage=(hd0,0)/boot/grub/splash.xpm.gz

title Gentoo Linux 2.6.31-r10
root (hd0,0)
#kernel /boot/kernel-genkernel-x86_64-2.6.31-gentoo-r10 root=/dev/ram0 real_root=/dev/sda3
kernel /boot/kernel-genkernel-x86_64-2.6.31-gentoo-r10 root=/dev/md125 md=125,/dev/sdc3,/dev/sda3
initrd /boot/initramfs-genkernel-x86_64-2.6.31-gentoo-r10

# blkid
/dev/sda1: UUID="89fee223-b845-4e0a-8a0b-e6cf695d5bcf" TYPE="ext2"
/dev/sda2: UUID="a72296a8-d7d4-447f-a34b-ee920fd1a767" TYPE="swap"
/dev/sda3: UUID="97eb0a6a-c385-4a9d-bf74-c0bab1fa4dc1" TYPE="ext3"
/dev/sdb: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member"
/dev/sdc1: UUID="d36537fd-19a0-b8a3-6418-8b8466721085" TYPE="linux_raid_member"
/dev/sdd: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member"
/dev/sde: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member"
/dev/md127: UUID="13a41589-4cf1-4c04-91ca-37484182c783" TYPE="ext4"
/dev/sdf: UUID="1a118934-c831-bdb3-6418-8b8466721085" TYPE="linux_raid_member"
/dev/sdc2: UUID="a1916397-1b48-45d7-9f98-73aa521e882f" TYPE="swap"
/dev/sdc3: UUID="48ec4190-a80d-4dde-6418-8b8466721085" TYPE="linux_raid_member"
/dev/md125: UUID="c947ed64-1d4d-4d1d-b4d2-24669fff916e" SEC_TYPE="ext2" TYPE="ext3"

# mdadm -E
mdadm: No devices to examine

# fdisk -l

Disk /dev/sda: 500.1 GB,500107862016 bytes
255 heads,63 sectors/track,60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe975e9fc

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1           5       40131   83  Linux
/dev/sda2               6        1311    10490445   82  Linux swap / Solaris
/dev/sda3            1312       60801   477853425   83  Linux

Disk /dev/sdc: 500.1 GB,60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe975e9fc

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1           5       40131   83  Linux
/dev/sdc2               6        1311    10490445   82  Linux swap / Solaris
/dev/sdc3            1312       60801   477853425   83  Linux

Disk /dev/md125: 489.3 GB,489321791488 bytes
2 heads,4 sectors/track,119463328 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk identifier: 0x00000000

Disk /dev/md125 doesn't contain a valid partition table