EMC 69001166 manual Powermt display dev=x, Every=2 command, That the failover path was

			Linux Installation Checklist
Task	With Access Logix	Without Access Logix	Reference Document
16 Server	If you have a PowerPath license key	If you have a PowerPath license key	PowerPath product
Test PowerPath	Note If your PowerPath license key is	Note If your PowerPath license key is	guide
with a license key	not registered, the load balancing	not registered, the load balancing
	policy is restricted to basic failover.	policy is restricted to basic failover.
	❑ View the LUNs available to the	❑ View the LUNs available to the
	server using the following	server using the following
	PowerPath command:	PowerPath command:
	powermt display dev=all	powermt display dev=all
	class=clariion	class=clariion
	❑ Choose one available LUN to	❑ Choose one available LUN to
	receive I/O for the test.	receive I/O for the test.
	❑ View the paths to the chosen	❑ View the paths to the chosen
	LUN using the following	LUN using the following
	PowerPath command:	PowerPath command:
	powermt display dev=x every=2	powermt display dev=x every=2
	where x is a pseudo device that	where x is a pseudo device that
	represents the chosen LUN.	represents the chosen LUN.
	❑ Start I/O to the LUN.	❑ Start I/O to the LUN.
	❑ Identify the HBA sending I/O to	❑ Identify the HBA sending I/O to
	the LUN by viewing the output of	the LUN by viewing the output of
	the powermt display dev=x	the powermt display dev=x
	every=2 command, and	every=2 command, and
	disconnect the cable to that HBA.	disconnect the cable to that HBA.
	❑ View the output of the powermt	❑ View the output of the powermt
	display dev=x every=2	display dev=x every=2
	command, and verify that	command, and verify that
	• The state of the uncabled	• The state of the uncabled
	path(s) becomes “dead.”	path(s) becomes “dead.”
	• I/O continues to the remaining	• I/O continues to the remaining
	path(s) to the LUN, indicating	path(s) to the LUN, indicating
	that the failover path was	that the failover path was
	successful, and PowerPath is	successful, and PowerPath is
	working properly.	working properly.
	❑ Reconnect the cable that you	❑ Reconnect the cable that you
	disconnected from the HBA.	disconnected from the HBA.

PowerPath Checklist — New Linux Server and Existing Storage System

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