Unable to rename the emcpower devices

Question

I have assigned the Fresh New storage from Cx3-40 .. And these power devices are getting used in veritas .. Now on both server emcpower device names are different in /etc/powermt display and in vxdisk list also ..

So as usual i use emcpadm export_mapping from one server and done import_mapping on another server ...

But i got strage error messages . I tried vice versa also but No Luck
then i tried renaming them manually but still its giving me error..

i have opened Serv 2 level case with EMC ..

I got RHEL 4 u4 with Powerpath 5.1 and VRTS 5.1 and both nodes in cluster.

[root@server1 ~]$ emcpadm import_mappings -v -f /root/newof01

WARNING: unable to restore mapping for emcpowera (lookup or unmapping error)
WARNING: unable to restore mapping for emcpowerb (lookup or unmapping error)
WARNING: unable to restore mapping for emcpowerc (lookup or unmapping error)
WARNING: unable to restore mapping for emcpowerd (lookup or unmapping error)
WARNING: unable to restore mapping for emcpowere (lookup or unmapping error)

[root@server1 ~]$ emcpadm getfree
Next free pseudo device name(s) from emcpowera are:

Pseudo Device Name Major# Minor#

emcpowerm 120 192

[root@server1]$ emcpadm renamepseudo -s emcpowerb -t emcpowerm

Conor · Answer

I think something may be holding the devices open, are all FS unmounted? Is naviagent stopped?

Conor · Answer

If this is PowerPath 5.0, Solaris10 and VxVM 5, please see the following emc185568

OS: Solaris 10
EMC SW: PowerPath 5.0
Application SW: VERITAS Volume Manager (VxVM) 5.0 MP1

Symptom: emcpadm renamepseudo -s XX -t XX fails with error

Symptom: vxdmpadm settune dmp_cache_open=off (per emc166911)

Symptom: vxdisk list shows emcpowerxxx online udid_mismatch

Fix: Remove these PowerPath devices from VxVM, and reissue the emcpadm command.

OnlySandy · Answer

thanks guys for you reply ..I saw these primus at time of issue .. But it was for Sol 10 so didnt went ahead doing same for Linux RHEL 4 ( U 4 ) .. Also at time of rename or import/export the naviagent was stopped also NO FS was created devices was in 'error' mode in VRTS ..As i was near to deadline i went ahead and Uninstalled the PP and reinstalled it .But again same error .. But i remeber emc recommend to install PP first then VRTS .. So i removed both PP and VRTS and then installed only PP and tried import/export .. It worked .. It was new environment thats why i done it like this but cannt afford to do same with my Prod servers ..

Conor · Answer

Thanks for the update Sandy, glad it was resolved... Conor

Conor · Answer

Install of PP before VxVM allowed the emcpower devices to be renamed, VxVM was installed afterwards...

OnlySandy · Answer

Yes thats what was my plan and its Succeeded .. BUT BUT i cant do same thing with my prod :-(( This was new setup so i taken the chance ..

PowerPath

Unable to rename the emcpower devices

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