1、modprobe dm_multipath
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 创建配置文件;
10、查看wwid命令如下:
/sbin/scsi_id -g -u -v /dev/sdb
11、 vi multipath.conf
参考配置如下:
# 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 删除现有路径
multipath -v2 格式化路径
multipath -ll 查看多路径
新磁盘默认位置:
/dev/mapper
结算LVM建立过程:
fdisk -l /dev/maper/sdb
格式化
并将磁盘分区类型改为
partprobe /dev/mapper/sdc
pvcreate /dev/mapper/sdcp1
vgcreate
lvcreate
之后磁盘就可以被挂载和使用了
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