1、modprobe?dm_multipath<?xml:namespace prefix="o">?xml:namespace>

2、modprobe?dm-multipath

3、modprobe?dm-rooud-robin

4、?lsmod?|grep?multipath

5、lsmod?|grep?multipath

6、chkconfig?--list|grep?multipath

7、?multipath?-v2

8、/sbin/mpathconf?--help

9、mpathconf?--enable?--find_multipaths?y?--with_module?y?--with_chkconfig?y??創(chuàng)建配置文件；

10、查看wwid命令如下：

/sbin/scsi_id?-g?-u?-v?/dev/sdb

11、?vi?multipath.conf

參考配置如下：

#?This?is?a?basic?configuration?file?with?some?examples,?for?device?mapper

#?multipath.

#?For?a?complete?list?of?the?default?configuration?values,?see

#?/usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf.defaults

#?For?a?list?of?configuration?options?with?descriptions,?see

#?/usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf.annotated

##?By?default,?devices?with?vendor?=?"IBM"?and?product?=?"S/390.*"?are

##?blacklisted.?To?enable?mulitpathing?on?these?devies,?uncomment?the

##?following?lines.

#blacklist_exceptions?{

#???????device?{

#???????????????vendor??"IBM"

#???????????????product?"S/390.*"

#???????}

#}

#???????????????product?"S/390.*"

#???????}

#}

##?Use?user?friendly?names,?instead?of?using?WWIDs?as?names.

defaults?{

????????polling_interval????10

????failback????????????immediate

????????path_grouping_policy?multipath

????no_path_retry???????fail

????user_friendly_names?no

}

##

##?Here?is?an?example?of?how?to?configure?some?standard?options.

##

#

#defaults?{

#???????udev_dir????????????????/dev

#???????polling_interval????????10

#???????selector????????????????"round-robin?0"

#???????path_grouping_policy????multibus

#???????getuid_callout??????????"/lib/udev/scsi_id?--whitelisted?--device=/dev/%n"

#???????prio????????????????????alua

#???????path_checker????????????readsector0

#???????rr_min_io???????????????100

#???????max_fds?????????????????8192

#???????rr_weight???????????????priorities

#???????failback????????????????immediate

#???????no_path_retry???????????fail

#???????user_friendly_names?????yes

#}

##

##?The?wwid?line?in?the?following?blacklist?section?is?shown?as?an?example

##?of?how?to?blacklist?devices?by?wwid.??The?2?devnode?lines?are?the

##?compiled?in?default?blacklist.?If?you?want?to?blacklist?entire?types

##?of?devices,?such?as?all?scsi?devices,?you?should?use?a?devnode?line.

##?However,?if?you?want?to?blacklist?specific?devices,?you?should?use

##?a?wwid?line.??Since?there?is?no?guarantee?that?a?specific?device?will

##?not?change?names?on?reboot?(from?/dev/sda?to?/dev/sdb?for?example)

##?devnode?lines?are?not?recommended?for?blacklisting?specific?devices.

##

#blacklist?{

#???????wwid?26353900f02796769

#???????devnode?"^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"

#???????devnode?"^hd[a-z]"#multipaths?{

#???????multipath?{

#???????????????wwid????????????????????3600508b4000156d700012000000b0000

#???????????????alias???????????????????yellow

#???????????????path_grouping_policy????multibus

#???????????????path_checker????????????readsector0

#???????????????path_selector???????????"round-robin?0"

#???????????????failback????????????????manual

#???????????????rr_weight???????????????priorities

#???????????????no_path_retry???????????5

#???????}

#???????multipath?{

#???????????????wwid????????????????????1DEC_____321816758474

#???????????????alias???????????????????red

#???????}

#}

#devices?{

#???????device?{

#???????????????vendor??????????????????"COMPAQ??"

#???????????????product?????????????????"HSV110?(C)COMPAQ"

#???????????????path_grouping_policy????multibus

#???????????????getuid_callout??????????"/lib/udev/scsi_id?--whitelisted?--device=/dev/%n"

#???????????????path_checker????????????readsector0

#???????????????path_selector???????????"round-robin?0"

#???????????????hardware_handler????????"0"

#???????????????failback????????????????15

#???????????????rr_weight???????????????priorities

#???????????????no_path_retry???????????queue

#???????}

#???????device?{

#???????????????vendor??????????????????"COMPAQ??"

#???????????????product?????????????????"MSA1000?????????"

#???????????????path_grouping_policy????multibus

#???????}

#}

blacklist?{

???????????????wwid?36848f690e9fa2a001896611f1865a9ae

}

multipaths??{

????multipath?{

????wwid???????360060e8006d942000000d94200000020

????alias????sdb

}

}

保存退出

multipath?-F??刪除現(xiàn)有路徑

multipath?-v2??格式化路徑

multipath?-ll???查看多路徑

新磁盤默認(rèn)位置：

/dev/mapper

結(jié)算LVM建立過程：

?fdisk?-l???/dev/maper/sdb

?格式化??

并將磁盤分區(qū)類型改為?

?partprobe?/dev/mapper/sdc

?pvcreate?/dev/mapper/sdcp1

vgcreate

lvcreate

之后磁盤就可以被掛載和使用了

轉(zhuǎn)載于:https://blog.51cto.com/redhatcciezhang/1186295

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