一步步做raid5+lvm实验

一步步做raid5+lvm实验

实验目的：

1。将sdb，sdc,sdd3块硬盘组成raid5模式

2。建立LVM

3。模拟故障，sdc出故障，删除该硬盘，再重新添加硬盘，恢复raid5

4。增加LVM容量

实验步骤

1，格式化3块硬盘

[root@RHEL5-1 ~]# fdisk /dev/sdb //格式化/dev/sdb

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only,

until you decide to write them. After that, of course, the previous

content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n //增加一个新的分区

Command action

e extended

p primary partition (1-4)

p //创建主分区

Partition number (1-4): 1 //分区号为1

First cylinder (1-130, default 1): //设置分区大小

Using default value 1

Last cylinder or +size or +sizeM or +sizeK (1-130, default 130):

Using default value 130

Command (m for help): t //改变系统的ID

Selected partition 1

Hex code (type L to list codes): fd //设置系统HEX为fd，即raid模式

Changed system type of partition 1 to fd (Linux raid autodetect)

Command (m for help): w //保存

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@RHEL5-1 ~]# fdisk /dev/sdc //格式化/dev/sdc

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only,

until you decide to write them. After that, of course, the previous

content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n

Command action

e extended

p primary partition (1-4)

p

Partition number (1-4): 1

First cylinder (1-130, default 1):

Using default value 1

Last cylinder or +size or +sizeM or +sizeK (1-130, default 130):

Using default value 130

Command (m for help): t

Selected partition 1

Hex code (type L to list codes): fd

Changed system type of partition 1 to fd (Linux raid autodetect)

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@RHEL5-1 ~]# fdisk /dev/sdd//格式化/dev/sdd

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only,

until you decide to write them. After that, of course, the previous

content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n

Command action

e extended

p primary partition (1-4)