redhat entprise 6.2 配置 multipath

[root@xwumpsdb ~]# yum -y install device-mapper-multipath

[root@xwumpsdb ~]# multipath -v2

Jan 09 10:49:42 | /etc/multipath.conf does not exist, blacklisting all devices.

Jan 09 10:49:42 | A sample multipath.conf file is located at

Jan 09 10:49:42 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf

Jan 09 10:49:42 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf

 

复制一个配置文件到 /etc 下

 

[root@xwumpsdb ~]# modprobe dm-multipath    加载模块

[root@xwumpsdb ~]# service multipathd start      启动服务

 

 

[root@xwumpsdb ~]# multipath -v2                    查看设备状态 

Jan 09 10:53:42 | mpatha: ignoring map

create: mpathb (36782bcb00066e968000008f84f049685) undef DELL,MD36xxf

size=1.0T features='0' hwhandler='0' wp=undef

|-+- policy='round-robin 0' prio=1 status=undef

| `- 1:0:0:0 sdb 8:16 undef ready running

|-+- policy='round-robin 0' prio=0 status=undef

| `- 1:0:1:0 sdc 8:32 undef faulty running

|-+- policy='round-robin 0' prio=1 status=undef

| `- 2:0:1:0 sde 8:64 undef ready running

`-+- policy='round-robin 0' prio=0 status=undef

  `- 2:0:0:0 sdd 8:48 undef faulty running

 

 

[root@xwumpsdb ~]# fdisk -l                             

再使用fdisk 看，会出现多个盘符

 

Disk /dev/sda: 146.2 GB, 146163105792 bytes

255 heads, 63 sectors/track, 17769 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: 0x00000080

 

   Device Boot Start End Blocks Id System

/dev/sda1 * 1 26 204800 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 26 281 2048000 82 Linux swap / Solaris

Partition 2 does not end on cylinder boundary.

/dev/sda3 281 17770 140483584 83 Linux

 

Disk /dev/sdb: 1099.5 GB, 1099511627776 bytes

255 heads, 63 sectors/track, 133674 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: 0x072cb38e

 

   Device Boot Start End Blocks Id System

/dev/sdb1 1 133674 1073736373+ 83 Linux

 

Disk /dev/sde: 1099.5 GB, 1099511627776 bytes

255 heads, 63 sectors/track, 133674 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: 0x072cb38e

 

   Device Boot Start End Blocks Id System

/dev/sde1 1 133674 1073736373+ 83 Linux

 

Disk /dev/mapper/mpathb: 1099.5 GB, 1099511627776 bytes

255 heads, 63 sectors/track, 133674 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: 0x072cb38e

 

             Device Boot Start End Blocks Id System

/dev/mapper/mpathbp1 1 133674 1073736373+ 83 Linux

 

Disk /dev/mapper/mpathbp1: 1099.5 GB, 1099506046464 bytes

255 heads, 63 sectors/track, 133673 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