[RAID与磁盘阵列] 怎样在redhat9上做raid1 [复制链接]

论坛徽章:: 0

发表于 2008-08-26 11:13 |显示全部楼层

5可用积分

我的硬盘当前的分区和挂载情况是：
[root@localhost /]# df -ah
文件系统             容量  已用可用已用% 挂载点
/dev/sda2          5.6G  1.9G  3.5G  35% /
none                   0    0    0 -  /proc
usbdevfs                0    0    0 -  /proc/bus/usb
/dev/sda1             99M  9.3M 85M  10% /boot
none                   0    0    0 -  /dev/pts
none                62M    0 62M 0% /dev/shm

我又添加了同样的一块硬盘，并且用fdisk划分出一个相同的sdb2，内容如下：
[root@localhost /]# fdisk -l

Disk /dev/sda: 6442 MB, 6442450944 bytes
255 heads, 63 sectors/track, 783 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start    End Blocks Id  System
/dev/sda1 *       1       13 104391 83  Linux
/dev/sda2          14    751 5927985 83  Linux
/dev/sda3          752    783 257040 82  Linux swap

Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start    End Blocks Id  System
/dev/sdb2          14    751 5927985 83  Linux

我的raid1配置文件内容如下：
[root@localhost /]# cat /etc/raidtab
# Sample raid-1 configuration
raiddev                /dev/md0
raid-level             1
nr-raid-disks          2
nr-spare-disks       0
chunk-size             4

device                /dev/sda2
raid-disk             0

device                /dev/sdb2
raid-disk             1

在执行mkraid /dev/md0的时候出现如下问题，希望高手给予解答：
[root@localhost /]# mkraid /dev/md0
handling MD device /dev/md0
analyzing super-block
disk 0: /dev/sda2, 5927985kB, raid superblock at 5927872kB
/dev/sda2 is mounted
mkraid: aborted.
(In addition to the above messages, see the syslog and /proc/mdstat as well
for potential clues.)

请问怎样解决这个问题，这种情况下应该如何实现raid1镜像

raid, raid