MPIO vs Powerpath commands

Hello,

Powerpath should work when you are migrating from one array to another. Did you upgrade powerpath also or only array?

Also in Solaris the native multipath tool called MPxIO only not MPIO. Here are the commands.

When upgrading from one array to another array powerpath configurations will not change unless there is any change in powerpath config.

There is a know issue in Powerpath 5.3.X and 5.5.X when arrays are removed and rebooted server it may discover the array by Sun Native multipath MPxIO.

You can verify by running PP command "powermt display options" whether the EMC arrays are managed or not under Powerpath. If you found the EMC array's are unmanaged then need set the arrays to manage under powerpath control.

Also there are some of the commands to check and manage the luns/array under MPxIO. The MPxIO command are available in the following link.

http://www.princeton.edu/~unix/Solaris/troubleshoot/mpathadm.html

When migrating from one array to another powerpath should understand the array to take under the control unless there is no change in powerpath config.

You can also check by running command "powermt display options" whether the Clariion arrays are managed or not.

Also you mentioned sun native multipath MPxIO managing the array. ( No MPIO in Solaris)

If it's Powerpath 5.3.X or 5.5.X then this symptons can be expected unless there is no change in PP.

You can use the below MPxIO commands to check and manage the MPxIO.

mpathadm Commands:

******************

1. List available multipathing support    

"mpathadm list mpath-support"

2. View properties for supported multipathing facilities.

'mpathadm show mpath-support facilityname"

3. List initiator ports.

"mpathadm list initiator-port"

4. Get initiator port properties.    

"mpathadm show initiator-port portname"

5. List available logical units.

"mpathadm list lu"

6. Get logical unit properties.

"mpathadm show lu lunname"

7. List logical units associated with a target port.

"mpatadm list lu -t portname"

8. Disable a path.

"mpathadm disable path -i initportname -t tgtportname -l luname"

Hope this will hep.

did you ever get an answer to this question?

Hello !

Sorry for the delay of my answer.

-Powerpath is version 3

-mpathadm command not found

-Powermt display options

        Default storage system class: all
        Show CLARiiON LUN names:      true

        Path Latency Monitor: Off

        Path Latency Threshold: 0 Sec.

        Storage
        System Class  Attributes
        ------------  ----------

        Symmetrix     periodic autorestore = on
                      status = unmanaged

        CLARiiON      periodic autorestore = on
                      status = unmanaged

Thanks

Regards

Consty

hmmm, suddenly there's a lot more posts than before.

But the question remains: are you happy with the result or do you need more help?

Am not sure what is the expectation, but presently as 'powermt display options' shows that powerpath will not manage Clariion or Symmetrix devices.

In case if you like powerpath to manage Clariion or symmetrix devices, ensure MPxIO is disabled and run powerpath command to manage clariion array

In case if you want MPxIO to control the device, then I believe Selva has already provided you the list of commands.

=============

In case if you want powerpath to manage your clariion devices then -

set mpxio-disable value to yes in BOTH fp.conf and iscsi.conf

Run

powermt manage class=clariion

While running the manage command, ensure no IO are flowing via the devices.