Linux 5 配置MD3200i 存储

一、客户端添加iscsi 安装包,启用ISCSI设备

1 yum -y install iscsi* 或者 rpm -ivh iscsi-initiator-utils-6.2.0.871-0.10.el5.x86_64.rpm

2 iscsiadm -m discovery -t sendtargets -p 10.0.10.10:3260

3 启动iscsi服务/etc/init.d/iscsi restart

二、查看磁盘

[root@svn etc]# fdisk -l

Disk /dev/sda: 299.4 GB, 299439751168 bytes

255 heads, 63 sectors/track, 36404 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x0008c810

Device Boot Start End Blocks Id System

/dev/sda1 * 1 26 204800 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 26 1070 8388608 82 Linux swap / Solaris

/dev/sda3 1070 36405 283827200 83 Linux

Disk /dev/sdb: 343.6 GB, 343597383680 bytes

255 heads, 63 sectors/track, 41773 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xa65da31b

Disk /dev/sde: 343.6 GB, 343597383680 bytes

255 heads, 63 sectors/track, 41773 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xa65da31b

Disk /dev/sdc: 343.6 GB, 343597383680 bytes

255 heads, 63 sectors/track, 41773 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xa65da31b

Disk /dev/sdd: 343.6 GB, 343597383680 bytes

255 heads, 63 sectors/track, 41773 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0xa65da31b

2.1划分分区

[root@localhost ~]# fdisk /dev/sdb

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to

switch off the mode (command 'c') and change display units to

sectors (command 'u').

Command (m for help): p

Disk /dev/sdb: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/sdb1 1 262 2104483+ 83 Linux

Command (m for help): d 1

Selected partition 1

Command (m for help): p

Disk /dev/sdb: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

Command (m for help): n

Command action

e extended

p primary partition (1-4)

p

Partition number (1-4): 1

First cylinder (1-121403, default 1):

Using default value 1

Last cylinder, +cylinders or +size{K,M,G} (1-121403, default 121403): +512M

Command (m for help): p

Disk /dev/sdb: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/sdb1 1 66 530113+ 83 Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

2.2分区格式化

[root@localhost ~]# mkfs.ext3 /dev/sdb1

mke2fs 1.41.12 (17-May-2010)

文件系统标签=

操作系统:Linux

块大小=4096 (log=2)

分块大小=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

33200 inodes, 132528 blocks

6626 blocks (5.00%) reserved for the super user

第一个数据块=0

Maximum filesystem blocks=138412032

5 block groups

32768 blocks per group, 32768 fragments per group

6640 inodes per group

Superblock backups stored on blocks:

32768, 98304

正在写入inode表: 完成

Creating journal (4096 blocks): 完成

Writing superblocks and filesystem accounting information: 完成

This filesystem will be automatically checked every 21 mounts or

180 days, whichever comes first. Use tune2fs -c or -i to override.

这些容量相同的磁盘对应着存储上面的数据端口（一一对应）

三、安装DM-multipath 软件包

由于需要实现存储设备的多路径访问及故障切换，故需要运行multipath服务，这个在centos中已经安装好了。如没有执行下面的命令。

（原理为EVA4400中的一个真实的virtual disk通过与2个冗余阵列控制器连接的2个MPX100B对外提供映射，故服务器上可以看到两个物理磁盘，但此磁盘对应一个真实的一个真实的virtual

disk，故这两条路径间可以实现故障切换和负载均衡）

rpm –ivh device-mapper-1.02.13-6.9.i686.rpm

rpm –ivh multipath-tools-0.4.7-34.18.i686.rpm

3.1相关软件

[root@svn etc]# rpm -aq | grep mapper

device-mapper-multipath-0.4.9-46.el6.x86_64

device-mapper-event-libs-1.02.66-6.el6.x86_64

device-mapper-multipath-libs-0.4.9-46.el6.x86_64

device-mapper-libs-1.02.66-6.el6.x86_64

device-mapper-event-1.02.66-6.el6.x86_64

device-mapper-1.02.66-6.el6.x86_64

安装完成后，使用命令modprobe dm_multipath来加载相应的模块，

可以使用lsmod |grep dm_multipath来检查安装是否正常。

四、配置文件的修改及创建

/etc/multipath.conf 是多路径软件的配置文件，其中大部分配置是注释掉的，可以将他保存为备用，然后新建一个multipath.conf 文件，编辑新的配置文件：

实际有用的就是下面这些参数：其余参数都可以注释掉：

defaults {

user_friendly_names yes

udev_dir /dev

path_grouping_policy multibus

failback immediate

no_path_retry fail

}

保存退出

启动服务

service multipathd restart

[root@localhost ~]# fdisk -l

Disk /dev/sda: 299.0 GB, 298999349248 bytes

255 heads, 63 sectors/track, 36351 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x0004e761

Device Boot Start End Blocks Id System

/dev/sda1 * 1 13 102400 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 13 536 4194304 82 Linux swap / Solaris

Partition 2 does not end on cylinder boundary.

/dev/sda3 536 36352 287693824 83 Linux

Disk /dev/sdb: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/sdb1 1 66 530113+ 83 Linux

Disk /dev/sdc: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/sdc1 1 66 530113+ 83 Linux

Disk /dev/sdd: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/sdd1 1 66 530113+ 83 Linux

Disk /dev/sde: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/sde1 1 66 530113+ 83 Linux

Disk /dev/mapper/mpathb: 998.6 GB, 998579896320 bytes

255 heads, 63 sectors/track, 121403 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x5df6a8ad

Device Boot Start End Blocks Id System

/dev/mapper/mpathbp1 1 66 530113+ 83 Linux

Disk /dev/mapper/mpathbp1: 542 MB, 542836224 bytes

255 heads, 63 sectors/track, 65 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/mapper/mpathbp1 doesn't contain a valid partition table

4.1挂载分区

[root@localhost ~]# mount /dev/mapper/mpathbp1 /tang/

[root@localhost ~]# mount

/dev/sda3 on / type ext4 (rw)

proc on /proc type proc (rw)

sysfs on /sys type sysfs (rw)

devpts on /dev/pts type devpts (rw,gid=5,mode=620)

tmpfs on /dev/shm type tmpfs (rw)

/dev/sda1 on /boot type ext4 (rw)

none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

/dev/mapper/mpathbp1 on /tang type ext3 (rw)

[root@localhost ~]# df -h

文件系统 容量 已用 可用 已用%% 挂载点

/dev/sda3 271G 3.1G 254G 2% /

tmpfs 12G 88K 12G 1% /dev/shm

/dev/sda1 97M 31M 61M 34% /boot

/dev/mapper/mpathbp1 510M 17M 468M 4% /tang