Can't rename pseudo device

Question

Hi, I can't get PP (5.7) to rename a pseudo device. Message I am getting eventually: 'WARNING: unable to restore mapping for emcpowera (lookup or unmapping error)'. Any input on how to fix this is much appreciated. Last weekend our VNX was swapped out (due to rotation of lab equipment used in solutions teams). Since getting the new LUNs assigned from the new VNX, PowerPath has assigned a new pseudo device name to all devices. I want to rename them back to the original names, but PowerPath says it can't do the rename. I tried it on the command line and with export/import of a mapping file. Both failed. In the examples below I am trying to rename the new emcpowerbq back to the original name of emcpowera. USING COMMAND LINE [root@r910a ~]# emcpadm getfreepseudos -n 1 -b emcpowera Next free pseudo device name(s) from emcpowera are: Pseudo Device Name      Major# Minor#         emcpowera         120      0 [root@r910a ~]# emcpadm renamepseudo -s emcpowerbq -t emcpowera [root@r910a ~]# emcpadm getused | grep bq         emcpowerbq        120   1088 [root@r910a ~]# emcpadm renamepseudo -s 1088 -t 0 USING EXPORT/IMPORT OF MAPPING FILE Exported the mappings. Removed all but emcpowerbq. Renamed pseudo_dev from 'bq' to 'a', as shown below: [root@r910a PPissue]# cat rename_bq_to_a_mapping.xml   5.7.0 (build 2)   r910a.gso.lab.emc.com       emcpowera     0x407840     clariion     wwn     11E47FE2E8777E1B003841A260010660   [root@r910a PPissue]# emcpadm check_mappings -x -f rename_bq_to_a_mapping.xml Imported Device            Remapping Status    Mapping ----------------  ------------------------------------------ emcpowera         remaps: emcpowerbq [root@r910a PPissue]# emcpadm import_mappings -x -f rename_bq_to_a_mapping.xml WARNING: unable to restore mapping for emcpowera (lookup or unmapping error) Thanks, Ed

EdSpaeny · Answer

Update:

This is to 'fix' the names on 2 nodes of a 2-node Oracle RAC setup.

The above original post shows the output on node 1.

I just tried it on the other node, without any problem! All names on node 2 are now switched back successfully!

This still leaves me with node1...

Thanks,

Ed

chetan011 · Answer

Hi All, Can anyone tell me what is the purpose of -x option in emcpadm command: emcpadm import_mapping -x -f /tmp/mapping.dmx Thanks Chetan Grover

brettesinclair · Answer

chetan011 wrote:

Hi All,

Can anyone tell me what is the purpose of -x option in emcpadm command:

emcpadm import_mapping -x -f /tmp/mapping.dmx

Thanks

Chetan Grover

It allows you to specify the format (in XML) of the mappings file data.

PowerPath

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