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