Storage Multipathing

Common EMC Power Path Polcies

powermt set policy=li|lb|rr|re [class=symm|clariion|ess|hitachi|hpxp|invista|all] [dev=device|all]

powermt set policy=si [dev=device|all]

powermt set policy=so [dev=device|all]

powermt set policy=co [dev=device|all]

powermt set policy=ad

# powermt set mode=standby adapter=<adapter#>

To enable a HBA from passing I/O

# powermt set mode=active adapter=<adapter#>

To set or validate the Load balancing policy

 To see the current load-balancing policy and I/Os run the following command

# powermt display dev=<device>

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so = Symmetrix Optimization (default)

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co = Clariion Optimization

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li = Least I/Os (queued)

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lb = Least Blocks (queued)

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rr = Round Robin (one path after another)

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re = Request (failover only)

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nr = No Redirect (no load-balancing or failover)To set to no load balancing

# powermt set policy=nr dev=<device>

To set the policy to default Symmetrix Optimization

# powermt set policy=so dev=<device>

To set the policy to default Clariion Optimization

# powermt set policy=co dev=<device>