linux multipath

load driver:

1. chkconfig boot.multipath on

2.chkconfig multipathd on

3. /etc/init.d/boot.multipath start

4. /etc/init.d/multipathd start

query multipath status:

multipath -l

stop multipath service:

1. /etc/init.d/boot.multipath stop

2. /etc/init.d/multipathd stop

/etc/scsi_id.config:

the info related to multipath

how to decide multipath:

the sds with the same uuid are combined into a dm

scsi_id -g -s /block/sda can get uuid

for red hat:

default multipath is not triggered

modify /etc/multipath.conf :

comment blacklist

remove dm:

multipath -F

multipath stop