Powerpath does not see HW path and I/O path

Question

Here is the partial output I see when I run the powermt display dev=all command Pseudo name=emcpowerdSymmetrix ID=000xxxxxxxx Logical device ID=0A3Bstate=alive; policy=SymmOpt; priority=0; queued-IOs=1;==============================================================================--------------- Host ---------------   - Stor -   -- I/O Path --  -- Stats ---###  HW Path               I/O Paths    Interf.   Mode    State   Q-IOs Errors==============================================================================   7 UNKNOWN                  unknown   FA  7eA   active  alive       0      0   7 UNKNOWN                  unknown   FA  8eA   active  alive       1      0   8 UNKNOWN                  unknown   FA 10eA   active  alive       0      0   8 UNKNOWN                  unknown   FA  9eA   active  alive       0      0 This is a VMAX device mounted on a RHEL host. Any ideas as to why this is happening. The device is working perfectly. It is in production.... How can I rectify this issue and make powerpath show me the paths.

Brion2 · Answer

Hi.  Were you running the powermt display with the 'every' option? Can you try running 'powermt restore' and 'powermt config'? Thanks, Brion

Brion2 · Answer

Also,what is the exact OS version?

Pramod_EMC · Answer

The OS on this server is Linux 2.6.18 and I ran the powermt display dev=all command and pasted the info of the device that has issue.

I tried powermt config, restore, check, save and all I can think of....

Nothing worked to fix this...

Brion2 · Answer

It looks like more indepth troubleshooting is necessary.  Please open a case with CS.

SKT2 · Answer

I had a similar scenario with hp-ux 11.23 and Vmax. But running discovery(ioscan , isnf) and power path commands got it working. You may have to do the equivalent commands in Linux, twise Hopefully it come up

Pramod_EMC · Answer

I talked to the CS and they want me to reboot the system.... (I am going to try this option in the next few days and will update you guys on the status)

Scanned for new devices multiple times... Always comes with a message, no changes found

Pramod_EMC · Answer

Reboot fixed the problem.... There was an underlying host issue.

SKT2 · Answer

what host issue?

Pramod_EMC · Answer

OS crashed when they tried to reboot the server

PowerPath

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