Device Mapper Multipath Configuration

1. Setup Steps

1.1 install and load device mapper (not necessary in RHEL58)

a) install Device Mapper Multipath/DMMP

b) load and check device mapper and multipath modules

c) start the multipathd service

d) enable multipathd service at startup


1.2. edit the configuration file

Here is my config file.

1.3. restart service with configuration file

a) restart service

b) flush all multipath device maps

c) check log of multipath for any warnings and errors

d) check multipath topology


2. Configuration Result

2.1 check the RAID status using iprconfig

2.2 multipath status


2.3 Conclusion

You can see with current config file, multipath used the correct asymmetric access status from our RAID utility.

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