Linux 6 配置multipath

启动多路径，通过mpathconf命令创建默认模板。创建默认配置，启动和激活multipathd进程，可以使用以下命令：
mpathconf --enable --with_multipathd y
配置完成后建议重新启动多路径软件：
/etc/init.d/multipathd restart

备注：启动完成后会在/etc/下生成multipath.conf 文件
以及在/etc/multipath下生成bindings 及wwid，
其中wwid记录了系统中所有挂载盘的盘唯一ID
Bindings记录了ID对应的映射盘
一般绑定完后会在/dev/mapper下产生类似于mpathx等文件

[root@perass multipath]# ls -ltr
-rw-------. 1 root root 692 12?9 2013 bindings
-rw-------. 1 root root 586 12?9 2013 wwids
[root@perass multipath]# cat bindings 
# Multipath bindings, Version : 1.0
# NOTE: this file is automatically maintained by the multipath program.
# You should not need to edit this file in normal circumstances.
#
# Format:
# alias wwid
#
mpatha 36782bcb01a2c77001945139a07659075
mpathb 36782bcb01a2c7700194513a70833506f
mpathc 3600a0b80006e82d800005fcb51ba55b2
mpathd 3600a0b80006e82d800005fcd51ba5655
mpathe 3600a0b80006e83620000609451ba57f6
mpathf 3600a0b80006e82d80000594550f783ef
mpathg 3600a0b80006e8362000059c450f784b7
mpathh 3600a0b80006e82d800005fcf51ba5725
mpathi 3600a0b80006e83620000609651ba5825
mpathj 3600a0b80006e82d800005fd151ba575c
mpathk 3600a0b80006e8362000069eb51faf50b
mpathl 3600a0b80006e836200006bba52980c0f
[root@perass multipath]# cat wwids 
# Multipath wwids, Version : 1.0
# NOTE: This file is automatically maintained by multipath and multipathd.
# You should not need to edit this file in normal circumstances.
#
# Valid WWIDs:
/36782bcb01a2c7700194513a70833506f/
/3600a0b80006e83620000609451ba57f6/
/3600a0b80006e82d800005fcd51ba5655/
/3600a0b80006e82d800005fcb51ba55b2/
/3600a0b80006e82d800005fd151ba575c/
/3600a0b80006e83620000609651ba5825/
/3600a0b80006e82d800005fcf51ba5725/
/3600a0b80006e8362000059c450f784b7/
/3600a0b80006e82d80000594550f783ef/
/3600a0b80006e8362000069eb51faf50b/
/3600a0b80006e836200006bba52980c0f/

[root@perass multipath]# multipath -ll
mpathd (3600a0b80006e82d800005fcd51ba5655) dm-3 IBM,1818      FAStT
size=279G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| |- 1:0:0:1 sdd 8:48  active ready running
| `- 2:0:1:1 sdp 8:240 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
  |- 1:0:1:1 sdh 8:112 active ghost running
  `- 2:0:0:1 sdl 8:176 active ghost running
mpathc (3600a0b80006e82d800005fcb51ba55b2) dm-4 IBM,1818      FAStT
size=721G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| |- 1:0:0:0 sdc 8:32  active ready running
| `- 2:0:1:0 sdo 8:224 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
  |- 1:0:1:0 sdg 8:96  active ghost running
  `- 2:0:0:0 sdk 8:160 active ghost running
mpathb (36782bcb01a2c7700194513a70833506f) dm-2 DELL,PERC H700
size=916G features='0' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
  `- 0:2:1:0 sdb 8:16  active ready running
mpathl (3600a0b80006e836200006bba52980c0f) dm-5 IBM,1818      FAStT
size=2.9T features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| |- 1:0:1:3 sdj 8:144 active ready running
| `- 2:0:0:3 sdn 8:208 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
  |- 1:0:0:3 sdf 8:80  active ghost running
  `- 2:0:1:3 sdr 65:16 active ghost running
mpathk (3600a0b80006e8362000069eb51faf50b) dm-6 IBM,1818      FAStT
size=2.0T features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
|-+- policy='round-robin 0' prio=6 status=active
| |- 1:0:1:2 sdi 8:128 active ready running
| `- 2:0:0:2 sdm 8:192 active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
  |- 2:0:1:2 sdq 65:0  active ghost running
  `- 1:0:0:2 sde 8:64  active ghost running